Ferro-actinolite
A valid IMA mineral species - grandfathered
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About Ferro-actinolite
Formula:
◻Ca2Fe2+5(Si8O22)(OH)2
Colour:
Black-green, dark green
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
3.24 - 3.48
Crystal System:
Monoclinic
Member of:
Name:
Named in 1946 by Nils Sundius for its relationship to actinolite.
Note: Tremolite is defined as having an Mg/(Mg+Fe2+) ratio ≥ 0.9; Actinolite has a ratio of 0.5–0.9 and Ferro-Actinolite has a ratio of less than 0.5.
Unique Identifiers
Mindat ID:
1505
Long-form identifier:
mindat:1:1:1505:5
IMA Classification of Ferro-actinolite
Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Redefined by the IMA
IMA Formula:
◻Ca2(Mg2.5-0.0Fe2+2.5-5.0)Si8O22(OH)2
First published:
1946
Approval history:
Redefined IMA 2012 s.p.
Classification of Ferro-actinolite
9.DE.10
9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles
9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles
14.22.6
14 : Silicates not Containing Aluminum
22 : Silicates of Fe and Ca
14 : Silicates not Containing Aluminum
22 : Silicates of Fe and Ca
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Fact | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Fac | Kretz (1983) | Kretz, R. (1983) Symbols of rock-forming minerals. American Mineralogist, 68, 277–279. |
| Fe2-Act | Siivolam & Schmid (2007) | Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download |
| Fac | Whitney & Evans (2010) | Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371 |
| Fac | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Ferro-actinolite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Black-green, dark green
Streak:
Greenish white
Hardness:
5 - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {110}, intersecting at 56° and 124°.
On {110}, intersecting at 56° and 124°.
Parting:
Parting on {100}.
Density:
3.24 - 3.48 g/cm3 (Measured) 3.34 g/cm3 (Calculated)
Optical Data of Ferro-actinolite
Type:
Biaxial (-)
RI values:
nα = 1.668 nβ = 1.685 nγ = 1.702
2V:
Measured: 10° to 12°, Calculated: 88°
Max. Birefringence:
δ = 0.034
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
r > v or r < v
Optical Extinction:
Y = b; Z ∧ c = 12.5°-17°.
Pleochroism:
Visible
Comments:
Moderate to strong, in yellows and greens.
Comments:
Absorption: Z > Y >= X.
Chemistry of Ferro-actinolite
Mindat Formula:
◻Ca2Fe2+5(Si8O22)(OH)2
Element Weights:
Common Impurities:
Ti,Al,Mn,Na,K,F,P
Chemical Analysis
Oxide wt%:
| 1 | |
|---|---|
| SiO2 | 52.09 % |
| TiO2 | 0.13 % |
| Al2O3 | 1.4 % |
| Cr2O3 | 0.01 % |
| MnO | 0.49 % |
| FeO | 21.61 % |
| MgO | 9.68 % |
| CaO | 12.2 % |
| Na2O | 0.24 % |
| K2O | 0.07 % |
| Total: | 97.92 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Na0.049K0.013)Σ0.062 (Ca1.961Na0.021Mn0.018)Σ2 (Fe2+2.632Mg2.165Fe3+0.08Al0.063Mn0.045Ti0.015Cr0.001)Σ5.001 (Si7.815Al0.185)Σ8O22 ((OH)1.971O0.029)Σ2 |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Engebøfjellet Eclogite Deposit, Naustdal, Sunnfjord, Vestland, Norway | Retrograde amphibole in late stage veins. Formula normalized by use of Locock, A. J. (2014). An Excel spreadsheet to classify chemical analyses of amphiboles following the IMA 2012 recommendations. Computers & Geosciences, 62, 1-11. |
Crystallography of Ferro-actinolite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.91 Å, b = 18.17 Å, c = 5.27 Å
β = 104.98°
β = 104.98°
Ratio:
a:b:c = 0.545 : 1 : 0.29
Unit Cell V:
916.69 ų (Calculated from Unit Cell)
Z:
4
Twinning:
Simple or lamellar twinning parallel to {100}.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0001999 | Ferro-actinolite | Evans B W, Yang H (1998) Fe-Mg order-disorder in tremolite-actinolite-ferro-actinolite at ambient and high temperature in an alteration of hornblende American Mineralogist 83 458-475 |  | 1998 | 0 | 293 | |
| 0002000 | Ferro-actinolite | Evans B W, Yang H (1998) Fe-Mg order-disorder in tremolite-actinolite-ferro-actinolite at ambient and high temperature in an alteration of hornblende, after heating at 700 C American Mineralogist 83 458-475 | | 1998 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.58 Å | (100) |
| 2.728 Å | (40) |
| 3.157 Å | (35) |
| 2.033 Å | (30) |
| 2.546 Å | (25) |
| 4.57 Å | (20) |
| 2.613 Å | (18) |
Comments:
Prieska, South Africa. ICDD 23-118.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 39 : High-? metamorphism (blueschist, eclogite, ultrahigh ? facies) | |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Synonyms of Ferro-actinolite
Other Language Names for Ferro-actinolite
Relationship of Ferro-actinolite to other Species
Member of:
Other Members of Actinolite Root Name Group:
| Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 | Mon. 2/m : B2/m |
| Mangano-actinolite | ◻Ca2(Mn,Mg,Fe)5(Si8O22)(OH)2 |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
| 23 photos of Ferro-actinolite associated with Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| 22 photos of Ferro-actinolite associated with Titanite | CaTi(SiO4)O |
| 13 photos of Ferro-actinolite associated with Calcite | CaCO3 |
| 13 photos of Ferro-actinolite associated with Quartz | SiO2 |
| 12 photos of Ferro-actinolite associated with Andradite | Ca3Fe3+2(SiO4)3 |
| 11 photos of Ferro-actinolite associated with Albite | Na(AlSi3O8) |
| 10 photos of Ferro-actinolite associated with Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| 8 photos of Ferro-actinolite associated with Prehnite | Ca2Al2Si3O10(OH)2 |
| 7 photos of Ferro-actinolite associated with Magnetite | Fe2+Fe3+2O4 |
| 6 photos of Ferro-actinolite associated with Hematite | Fe2O3 |
Related Minerals - Strunz-mindat Grouping
| 9.DE. | Shojiite | Na(NaMg)Mg5Si8O22(OH)2 |
| 9.DE. | Clino-suenoite | ◻{Mn2+2}{Mg5}(Si8O22)(OH)2 |
| 9.DE. | Mangani-eckermannite | NaNa2(Mg4Mn3+)Si8O22(OH)2 |
| 9.DE.05 | Permanganogrunerite | ◻{Mn2+2}{Mn2+5}(Si8O22)(OH)2 |
| 9.DE.05 | Cummingtonite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
| 9.DE.05 | Ferri-fluoro-leakeite | {Na}{Na2}{Mg2Fe3+2Li}(Si8O22)F2 |
| 9.DE.05 | Grunerite | ◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2 |
| 9.DE.05 | Clino-holmquistite Root Name Group | ◻{Li2}{Z2+3Z3+2}(Si8O22)(OH,F,Cl)2 |
| 9.DE.10 | Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| 9.DE.10 | Fluoro-cannilloite | CaCa2(Mg4Al)(Si5Al3)O22F2 |
| 9.DE.10 | Joesmithite | Pb2+Ca2(Mg3Fe3+2)(Si6Be2)O22(OH)2 |
| 9.DE.10 | Clino-ferro-suenoite | ◻{Mn2+2}{Fe2+5}(Si8O22)(OH)2 |
| 9.DE.10 | Fluoro-tremolite | ◻Ca2Mg5(Si8O22)F2 |
| 9.DE.10 | Parvo-manganotremolite | ◻{CaMn2+}{Mg5}(Si8O22)(OH)2 |
| 9.DE.10 | Magnesio-ferri-hornblende | ◻Ca2(Mg4Fe3+)[(Si7Al)O22](OH)2 |
| 9.DE.10 | Ferro-ferri-hornblende | ◻Ca2(Fe2+4Fe3+)(AlSi7O22)(OH)2 |
| 9.DE.10 | Ferro-cannilloite | CaCa2(Fe2+4Al)(Si5Al3O22)OH2 |
| 9.DE.10 | Ferro-ferri-cannilloite | CaCa2(Fe2+4Fe3+)(Si5Al3O22)OH2 |
| 9.DE.10 | Ferro-fluoro-actinolite | ◻{Ca2}{Fe5}(Si8O22)F2 |
| 9.DE.10 | Ferro-fluoro-hornblende | ◻Ca2(Fe2+4Al)(AlSi7O22)F2 |
| 9.DE.10 | Magnesio-ferri-fluoro-hornblende | ◻Ca2(Mg4Fe3+)(AlSi7O22)F2 |
| 9.DE.10 | Ferro-ferri-fluoro-hornblende | ◻Ca2(Fe2+4Fe3+)(AlSi7O22)F2 |
| 9.DE.10 | Ferri-fluoro-tschermakite | ◻{Ca2}{Mg3Fe3+2}(Al2Si6O22)F2 |
| 9.DE.10 | Ferro-ferri-fluoro-tschermakite | ◻{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)F2 |
| 9.DE.10 | Ferro-fluoro-tschermakite | ◻{Ca2}{Fe2+3Al2}(Al2Si6O22)F2 |
| 9.DE.10 | Fluoro-tschermakite | ◻{Ca2}{Mg3Al2}(Al2Si6O22)F2 |
| 9.DE.10 | Magnesio-fluoro-hornblende | ◻Ca2(Mg4Al)(AlSi7O22)F2 |
| 9.DE.10 | Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| 9.DE.10 | Ferro-ferri-tschermakite | ◻{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)(OH)2 |
| 9.DE.10 | Cannilloite | CaCa2(Mg4Al)(Si5Al3O22)OH2 |
| 9.DE.10 | Tschermakite | ◻(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2 |
| 9.DE.10 | Magnesio-hornblende | ◻Ca2(Mg4Al)(Si7Al)O22(OH)2 |
| 9.DE.10 | Ferri-tschermakite | ◻{Ca2}{Mg3Fe3+2}(Al2Si6O22)(OH)2 |
| 9.DE.10 | Ferro-hornblende | ◻Ca2(Fe2+4Al)(Si7Al)O22(OH)2 |
| 9.DE.10 | Ferro-tschermakite | ◻{Ca2}{Fe2+3Al2}(Al2Si6O22)(OH)2 |
| 9.DE.15 | Potassic-chloro-pargasite | KCa2(Mg4Al)(Si6Al2)O22Cl2 |
| 9.DE.15 | Ferro-fluoro-pargasite | (Na)(Ca2)(Fe2+4Al)(Al2Si6O22)F2 |
| 9.DE.15 | Potassic-ferro-chloro-edenite | KCa2Fe2+5(AlSi7O22)Cl2 |
| 9.DE.15 | Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2 |
| 9.DE.15 | Hastingsite | NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2 |
| 9.DE.15 | Fluoro-edenite | NaCa2Mg5(Si7Al)O22F2 |
| 9.DE.15 | Pargasite | NaCa2(Mg4Al)(Si6Al2)O22(OH)2 |
| 9.DE.15 | Magnesio-fluoro-hastingsite | NaCa2(Mg4Fe3+)(Si6Al2)O22F2 |
| 9.DE.15 | Potassic-fluoro-hastingsite | KCa2(Fe2+4Fe3+)(Si6Al2)O22F2 |
| 9.DE.15 | Potassic-chloro-hastingsite | KCa2(Fe2+4Fe3+)(Si6Al2)O22Cl2 |
| 9.DE.15 | Unnamed (F-dominant analogue of Ferri-kaersutite) | (Na,K)Ca2[Mg3(Fe3+,Fe2+)Ti](Si6Al2O22)(F,O)2 |
| 9.DE.15 | Edenite | NaCa2Mg5(Si7Al)O22(OH)2 |
| 9.DE.15 | Potassic-sadanagaite | {K}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2 |
| 9.DE.15 | Ferri-kaersutite | NaCa2(Mg3Fe3+Ti)(Si6Al2O22)O2 |
| 9.DE.15 | Potassic-pargasite | KCa2(Mg4Al)(Si6Al2)O22(OH)2 |
| 9.DE.15 | Potassic-ferro-sadanagaite | {K}{Ca2}{Fe2+3Al2}(Al3Si5O22)(OH)2 |
| 9.DE.15 | Kaersutite | NaCa2(Mg3AlTi4+)(Si6Al2)O22O2 |
| 9.DE.15 | Ferro-chloro-pargasite | NaCa2(Fe2+4Al)(Al2Si6O22)Cl2 |
| 9.DE.15 | Potassic-fluoro-pargasite | KCa2(Mg4Al)(Si6Al2)O22F2 |
| 9.DE.15 | Potassic-ferro-ferri-sadanagaite | {K}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2 |
| 9.DE.15 | Fluoro-pargasite | NaCa2(Mg4Al)(Si6Al2)O22F2 |
| 9.DE.15 | Parvo-mangano-edenite | {Na}{CaMn2+}{Mg5}(AlSi7O22)(OH)2 |
| 9.DE.15 | Ferro-fluoro-edenite | NaCa2Fe2+5(AlSi7O22)F2 |
| 9.DE.15 | Mangani-pargasite | NaCa2(Mg4Mn3+)(Si6Al2)O22(OH)2 |
| 9.DE.15 | Sadanagaite | {Na}{Ca2}{Mg3Al2}(Si5Al3O22)(OH)2 |
| 9.DE.15 | Magnesio-hastingsite | NaCa2(Mg4Fe3+)(Si6Al2)O22(OH)2 |
| 9.DE.15 | Ferri-sadanagaite | {Na}{Ca2}{Mg3Fe3+2}(Al3Si5O22)(OH)2 |
| 9.DE.15 | Ferro-sadanagaite | {Na}{Ca2}{Fe3Al2}(Al3Si5O22)(OH)2 |
| 9.DE.15 | Ferri-fluoro-sadanagaite | {Na}{Ca2}{Mg3Fe3+2}(Al3Si5O22)F2 |
| 9.DE.15 | Ferro-ferri-fluoro-sadanagaite | {Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)F2 |
| 9.DE.15 | Ferro-fluoro-sadanagaite | {Na}{Ca2}{Fe2+3Al2}(Al3Si5O22)F2 |
| 9.DE.15 | Fluoro-sadanagaite | {Na}{Ca2}{Mg3Al2}(Al3Si5O22)F2 |
| 9.DE.15 | Potassic-chloro-sadanagaite | {K}{Ca2}{Mg3Al2}(Al3Si5O22)Cl2 |
| 9.DE.15 | Potassic-ferro-chloro-sadanagaite | {K}{Ca2}{Fe2+3Al2}(Al3Si5O22)Cl2 |
| 9.DE.15 | Ferro-edenite | NaCa2Fe2+5(Si7Al)O22(OH)2 |
| 9.DE.15 | Oxo-magnesio-hastingsite | NaCa2(Mg3(Fe3+2-x,Tix))5(Si6Al2O22)O2 |
| 9.DE.15 | Potassic-ferro-pargasite | KCa2(Fe2+4Al)(Si6Al2)O22(OH)2 |
| 9.DE.15 | Potassic-hastingsite | KCa2(Fe2+4Fe3+)(Al2Si6O22)(OH)2 |
| 9.DE.15 | Fluoro-hastingsite | NaCa2(Fe2+4Fe3+)(Al2Si6O22)F2 |
| 9.DE.15 | Potassic-magnesio-hastingsite | KCa2(Mg4Fe3+)(Si6Al2)O22(OH)2 |
| 9.DE.15 | Vanadio-pargasite | NaCa2(Mg3+4V)(Al2Si6)O22(OH)2 |
| 9.DE.15 | Ferro-kaersutite | NaCa2{Fe2+3AlTi}(Si6Al2O22)O2 |
| 9.DE.15 | Chromio-pargasite | NaCa2(Mg4Cr)(Si6Al2)O22(OH)2 |
| 9.DE.15 | Ferro-pargasite | NaCa2(Fe2+4Al)(Si6Al2)O22(OH)2 |
| 9.DE.20 | Ghoseite | ◻[Mn2+Na][Mg4Al]Si8O22(OH)2 |
| 9.DE.20 | Potassic-ferro-taramite | K{CaNa}{Fe2+3Al2}{Si6Al2}O22(OH)2 |
| 9.DE.20 | Ferri-fluoro-katophorite | Na(CaNa)(Mg4Fe3+)(AlSi7O22)F2 |
| 9.DE.20 | Barroisite | ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
| 9.DE.20 | Fluoro-richterite | {Na}{CaNa}{Mg5}(Si8O22)(F,OH)2 |
| 9.DE.20 | Potassic-ferro-ferri-taramite | K(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2 |
| 9.DE.20 | Potassic-ferri-katophorite | K(CaNa)(Mg4Fe3+)(AlSi7O22)(OH)2 |
| 9.DE.20 | Potassic-ferro-richterite | {K}{CaNa}{Fe2+5}Si8O22(OH)2 |
| 9.DE.20 | Potassic-fluoro-richterite | {K}{CaNa}{Mg5}(Si8O22)(F,OH)2 |
| 9.DE.20 | Potassic-richterite | {K}{CaNa}{Mg5}Si8O22(OH)2 |
| 9.DE.20 | Ferri-ghoseite | ◻[Mn2+Na][Mg4Fe3+]Si8O22(OH)2 |
| 9.DE.20 | Fluoro-taramite | {Na}{CaNa}{Mg3Al2}(Al2Si6O22)F2 |
| 9.DE.20 | Ferro-ferri-fluoro-katophorite | Na(CaNa)(Fe2+4Fe3+)(AlSi7O22)F2 |
| 9.DE.20 | Richterite | Na(NaCa)Mg5(Si8O22)(OH)2 |
| 9.DE.20 | Ferri-winchite | ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2 |
| 9.DE.20 | Fluoro-katophorite | Na(CaNa)(Mg4Al)(AlSi7O22)F2 |
| 9.DE.20 | Hjalmarite | {Na}(NaMn}{Mg5}Si8O22(OH)2 |
| 9.DE.20 | Ferro-taramite | Na(CaNa)(Fe2+3Al2)(Al2Si6O22)(OH)2 |
| 9.DE.20 | Clinoferroholmquistite | ◻Li2[Fe2+3Al2]Si8O22(OH,F)2 |
| 9.DE.20 | Ferro-katophorite | {Na}{CaNa}{Fe2+4Al}[(AlSi7)O22](OH)2 |
| 9.DE.20 | Taramite | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
| 9.DE.20 | Potassic-fluoro-katophorite | K(CaNa)(Mg4Al)(AlSi7O22)F2 |
| 9.DE.20 | Ferro-fluoro-katophorite | Na(CaNa)(Fe2+4Al)(AlSi7O22)F2 |
| 9.DE.20 | Ferri-katophorite | Na(CaNa)(Mg4Fe3+)(AlSi7O22)(OH)2 |
| 9.DE.20 | Ferro-ferri-barroisite | ◻(CaNa)(Fe2+3Fe3+2)(AlSi7O22)(OH)2 |
| 9.DE.20 | Ferri-taramite | Na(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH)2 |
| 9.DE.20 | Potassic-ferro-ferri-katophorite | {K}{CaNa}{Fe2+4Fe3+}[(AlSi7)O22](OH)2 |
| 9.DE.20 | Ferro-ferri-winchite | ◻[CaNa][Fe2+4(Fe3+,Al)]Si8O22(OH)2 |
| 9.DE.20 | Winchite | ◻{CaNa}{Mg4Al}(Si8O22)(OH)2 |
| 9.DE.20 | Ferro-fluoro-richterite | {Na}{CaNa}{Fe2+5}(Si8O22)F2 |
| 9.DE.20 | Fluoro-winchite | ◻{CaNa}{Mg4Al}(Si8O22)F2 |
| 9.DE.20 | Ferro-fluoro-winchite | ◻{CaNa}{Fe2+4Al}(Si8O22)F2 |
| 9.DE.20 | Ferri-barroisite | ◻(CaNa)(Mg3Fe3+2)(AlSi7O22)(OH)2 |
| 9.DE.20 | Ferro-ferri-taramite | Na(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2 |
| 9.DE.20 | Ferri-fluoro-barroisite | ◻{CaNa}{Mg3Fe3+2}(AlSi7O22)F2 |
| 9.DE.20 | Ferro-fluoro-barroisite | ◻{CaNa}{Fe2+3Al2}(AlSi7O22)F2 |
| 9.DE.20 | Ferro-ferri-fluoro-barroisite | ◻{CaNa}{Fe2+3Fe3+2}(AlSi7O22)F2 |
| 9.DE.20 | Fluoro-barroisite | ◻{CaNa}{Mg3Al2}(AlSi7O22)F2 |
| 9.DE.20 | Ferro-ferri-katophorite | Na(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2 |
| 9.DE.20 | Ferri-fluoro-taramite | Na(CaNa)(Mg3Fe3+2)(Al2Si6O22)F2 |
| 9.DE.20 | Ferro-ferri-fluoro-taramite | Na(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)F2 |
| 9.DE.20 | Ferro-fluoro-taramite | Na(CaNa)(Fe2+3Al2)(Al2Si6O22)F2 |
| 9.DE.20 | Potassic-ferri-taramite | K(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH)2 |
| 9.DE.20 | Magnesiotaramite | {Na}{CaNa}{Mg3AlFe3+}(Al2Si6O22)(OH)2 |
| 9.DE.20 | Ferro-barroisite | ◻{CaNa}{Fe2+3Al2}(AlSi7O22)(OH)2 |
| 9.DE.20 | Scandio-winchite | ◻(NaCa)(Mg4Sc)(Si8O22)(OH)2 |
| 9.DE.20 | Ferro-richterite | {Na}{CaNa}{Fe2+5}(Si8O22)(OH)2 |
| 9.DE.20 | Katophorite | {Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2 |
| 9.DE.20 | Ferro-winchite | ◻{CaNa}{Fe2+4Al}(Si8O22)(OH)2 |
| 9.DE.25 | Clino-sodic-fluoro-holmquistite | {Na}{Li2}{Mg4Al}(Si8O22)F2 |
| 9.DE.25 | Ferro-ferri-nybøite | NaNa2[(Fe2+3,Mg)Fe3+2](AlSi7O22)(OH)2 |
| 9.DE.25 | Clino-ferro-ferri-holmquistite | ◻{Li2}{Fe2+3Fe3+2}(Si8O22)(OH)2 |
| 9.DE.25 | Oxo-pargasite | NaCa2(Mg3(Al2-xTix))5(Si6Al2O22)O2 |
| 9.DE.25 | Ferri-nybøite | NaNa2(Mg3Fe3+2](AlSi7O22)(OH)2 |
| 9.DE.25 | Ferro-ferri-leakeite | [Na][Na2][Fe2+2Fe3+2Li]Si8O22(OH)2 |
| 9.DE.25 | Ferro-ferri-fluoro-leakeite | Na(Na2)(Fe2+2Fe3+2Li)(Si8O22)(F)2 |
| 9.DE.25 | Ferri-leakeite | [Na][Na2][Mg2Fe3+2Li]Si8O22(OH)2 |
| 9.DE.25 | Fluoro-pedrizite | NaLi2(Mg2Al2Li)(Si8O22)F2 |
| 9.DE.25 | Eckermannite | NaNa2(Mg4Al}Si8O22(OH)2 |
| 9.DE.25 | Arfvedsonite | [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2 |
| 9.DE.25 | Mangano-ferri-fluoro-leakeite | NaNa2(Mn2+2Fe3+2Li)[Si8O22]F2 |
| 9.DE.25 | Ferri-obertiite | NaNa2(Mg3Fe3+Ti)Si8O22O2 |
| 9.DE.25 | Riebeckite | ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2 |
| 9.DE.25 | Unnamed (Possible K-analogue of Ferri-obertiite) | KNa2((Mg,Fe,Na)3Fe3+(Ti,Fe))Si8O22(O,F)2 |
| 9.DE.25 | Magnesio-fluoro-arfvedsonite | [Na][Na2][Mg4Fe3+][Si8O22](F,OH)2 |
| 9.DE.25 | Ferro-fluoro-glaucophane | ◻[Na2][Fe2+3Al2]Si8O22F2 |
| 9.DE.25 | Oxo-mangani-leakeite | NaNa2(Mn3+4Li)Si8O22O2 |
| 9.DE.25 | Fluoro-leakeite | NaNa2(Mg2Al2Li)(Si8O22)F2 |
| 9.DE.25 | Nybøite | NaNa2(Mg3Al2)(AlSi7O22)(OH)2 |
| 9.DE.25 | Sodic-ferri-clinoferroholmquistite | Na0.5{Li2}{Fe2+3Fe3+2}(Si8O22)(OH)2 |
| 9.DE.25 | Potassic-arfvedsonite | [(K,Na)][Na2][Fe2+4Fe3+]Si8O22(OH)2 |
| 9.DE.25 | Potassic-mangano-mangani-ungarettiite | KNa2(Mn2+2Mn3+3)Si8O22O2 |
| 9.DE.25 | Potassic-jeanlouisite | K(NaCa)(Mg4Ti)Si8O22O2 |
| 9.DE.25 | Ferri-pedrizite | [Na][Li2][Mg2Fe3+2Li]Si8O22(OH)2 |
| 9.DE.25 | Glaucophane | ◻[Na2][Mg3Al2]Si8O22(OH)2 |
| 9.DE.25 | Ferro-fluoro-pedrizite | Na(Li2)(Fe2+2Al2Li)[Si8O22]F2 |
| 9.DE.25 | Potassic-ferri-leakeite | [K][Na2][Mg2Fe3+2Li]Si8O22(OH)2 |
| 9.DE.25 | Potassic-magnesio-fluoro-arfvedsonite | [(K,Na)][Na2][Mg4Fe3+][Si8O22][(F,OH)2] |
| 9.DE.25 | Mangani-obertiite | NaNa2(Mg3Mn3+Ti4+)Si8O22O2 |
| 9.DE.25 | Scandio-fluoro-eckermannite | NaNa2(Mg4Sc)(Si8O22)F2 |
| 9.DE.25 | Ferro-eckermannite | NaNa2(Fe2+4Al)Si8O22(OH)2 |
| 9.DE.25 | Ferro-ferri-pedrizite | [Na][Li2][Fe2+2Fe3+2Li]Si8O22(OH)2 |
| 9.DE.25 | Pedrizite | NaLi2(LiMg2Al2)(Si8O22)(OH)2 |
| 9.DE.25 | Ferro-pedrizite | NaLi2(Fe2+2Al2Li)Si8O22(OH)2 |
| 9.DE.25 | Potassic-mangani-leakeite | [(Na,K)][Na2][Mg2Mn3+2Li]Si8O22(OH)2 |
| 9.DE.25 | Clino-fluoro-holmquistite | ◻{Li2}{Mg3Al2}(Si8O22)F2 |
| 9.DE.25 | Ferro-ferri-obertiite | NaNa2(Fe2+3Fe3+Ti)Si8O22O2 |
| 9.DE.25 | Magnesio-riebeckite | ◻{Na2}{Mg3Fe3+2}(Si8O22)(OH)2 |
| 9.DE.25 | Potassic-magnesio-arfvedsonite | [K][Na2][Mg4Fe3+]Si8O22(OH)2 |
| 9.DE.25 | Fluoro-nybøite | NaNa2(Mg3Al2)(AlSi7O22)(F,OH)2 |
| 9.DE.25 | Mangano-ferri-eckermannite | {Na}{Na2}{Mn2+4Fe3+}Si8O22(OH)2 |
| 9.DE.25 | Fluoro-glaucophane | ◻[Na2][Mg3Al2]Si8O22F2 |
| 9.DE.25 | Fluoro-riebeckite | ◻{Na2}{Fe2+3Fe3+2}(Si8O22)F2 |
| 9.DE.25 | Magnesio-fluoro-riebeckite | ◻{Na2}{Mg3Fe3+2}(Si8O22)F2 |
| 9.DE.25 | Fluoro-eckermannite | NaNa2(Mg4Al}Si8O22F2 |
| 9.DE.25 | Ferro-fluoro-eckermannite | NaNa2(Fe2+4Al}Si8O22F2 |
| 9.DE.25 | Fluoro-arfvedsonite | [Na][Na2][Fe2+4Fe3+]Si8O22F2 |
| 9.DE.25 | Magnesio-arfvedsonite | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
| 9.DE.25 | Ferri-fluoro-nybøite | NaNa2(Mg3Fe3+2)(AlSi7O22)F2 |
| 9.DE.25 | Ferro-ferri-fluoro-nybøite | NaNa2(Fe2+3Fe3+2)(AlSi7O22)F2 |
| 9.DE.25 | Ferro-glaucophane | ◻[Na2][Fe2+3Al2]Si8O22(OH)2 |
| 9.DE.25 | Ferro-fluoro-nybøite | NaNa2(Fe2+3Al2)(AlSi7O22)F2 |
| 9.DE.25 | Mangani-dellaventuraite | NaNa2(MgMn3+2Ti4+Li)Si8O22O2 |
| 9.DE.25 | Ferro-leakeite | NaNa2(Fe2+2Al2Li)(Si8O22)(OH)2 |
| 9.DE.25 | Leakeite | NaNa2(Mg2Al2Li)(Si8O22)(OH)2 |
| 9.DE.25 | Potassic-leakeite | KNa2(Mg2Al2Li)(Si8O22)(OH)2 |
| 9.DE.25 | Ferri-fluoro-pedrizite | NaLi2(LiMg2Fe3+2)(Si8O22)F2 |
| 9.DE.25 | Ferro-ferri-fluoro-pedrizite | NaLi2(LiFe2+2Fe3+2)(Si8O22)F2 |
| 9.DE.25 | Ferro-nybøite | NaNa2(Fe2+3Al2)(AlSi7)O22(OH)2 |
| 9.DE.25 | Clino-ferro-ferri-fluoro-holmquistite | ◻{Li2}{Fe2+3Fe3+2}(Si8O22)F2 |
| 9.DE.25 | Mangano-mangani-ungarettiite | NaNa2(Mn2+2Mn3+3)(Si8O22)O2 |
| 9.DE.25 | Clino-ferri-fluoro-holmquistite | ◻{Li2}{Mg3Fe3+2}(Si8O22)F2 |
| 9.DE.25 | Clino-ferro-fluoro-holmquistite | ◻{Li2}{Fe2+3Al2}(Si8O22)F2 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Ferro-actinolite
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https://www.mindat.org/min-1505.html
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References for Ferro-actinolite
Reference List:
Evans, Bernard W., Yang, Hexiong (1998) Fe-Mg order-disorder in tremolite-actinolite-ferro-actinolite at ambient and high temperature. American Mineralogist, 83 (5) 458-475 doi:10.2138/am-1998-5-606
Verkouteren, Jennifer R., Wylie, Ann G. (2000) The tremolite-actinolite-ferro–actinolite series: Systematic relationships among cell parameters, composition, optical properties, and habit, and evidence of discontinuities. American Mineralogist, 85 (9) 1239-1254 doi:10.2138/am-2000-8-917
Ishida, Kiyotaka, Hawthorne, Frank C., Ando, Yumi (2002) Fine structure of infrared OH-stretching bands in natural and heat-treated amphiboles of the tremolite-ferro-actinolite series. American Mineralogist, 87 (7) 891-898 doi:10.2138/am-2002-0712
Verkouteren, Jennifer R., Wylie, Ann G. (2002) Anomalous optical properties of fibrous tremolite, actinolite, and ferro-actinolite. American Mineralogist, 87 (8) 1090-1095 doi:10.2138/am-2002-8-905
Ishida, Kiyotaka, Hawthorne, Frank C., Ando, Yumi (2002) Fine structure of infrared OH-stretching bands in natural and heat-treated amphiboles of the tremolite-ferro-actinolite series. American Mineralogist, 87 (7) 891-898 doi:10.2138/am-2002-0712
Jenkins, D. M. (2003) Stability and thermodynamic properties of ferro-actinolite: A re-investigation. American Journal of Science, 303 (8) 723-752 doi:10.2475/ajs.303.8.723
Localities for Ferro-actinolite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Argentina | |
| Sureda et al. (2010) |
| PONS +2 other references |
| Brodtkorb (2002) |
Australia | |
| A.G. Christy (unpubl. analyses, 2004) |
| Gole (1981) |
| Birch (1999) |
| Cave et al. (2024) |
| Costas Constantinides collection (Ian Graham) |
| Wang et al. (2024) |
| G.S. Teale and A.M. Brewer (2003) |
| Nikolakopoulos (2013) |
| Taheri +1 other reference |
| Sorrell (n.d.) | |
| Bottrill et al. (2008) |
| R Bottrill unpub. Data |
| Orth (2002) |
| Lintern (2004) |
| Meinert |
Austria | |
| Götzinger (1981) +1 other reference |
| Nikopoulou et al. (2025) |
| Kolitsch et al. (2012) |
Brazil | |
| Soares et al. (2025) |
| Jost et al. (2001) |
| Revista Brasileira de Geociências 30 (2) |
| Monteiro et al. (2008) |
| Tazava (1999) +1 other reference |
| Souza Neto et al. (2008) |
Bulgaria | |
| Vassileva et al. (2001) |
Cameroon | |
| Tetsopgang et al. (2003) |
Canada | |
| ... |
| Doucette et al. (1997) |
| Hicken et al. (2013) |
| Jones (2019) |
| Péntek et al. (2013) |
| McCormick et al. (1999) |
| Pan et al. (1992) |
| Econ Geol. (1995) +1 other reference |
| Canadian Museum of Nature data (XRD, WDS) |
| Arguin et al. (2018) |
| Liverton et al. (eds.) |
China | |
| Lingdi Zhou et al. (1989) |
| Yiming Zhao and Daxin Li (2003) |
| |
| Miao Yu et al. (2013) +1 other reference |
| Ma et al. (2022) |
| Fang et al. (2024) |
| Hua Huang et al. (2014) |
| Zu et al. (2019) |
| Tao Ren et al. (2013) | |
| Fan et al. (2025) |
Czech Republic | |
| Zimák (2008) |
| Scharm et al. (2000) |
| Dolníček Z et al. (2020) |
Dominican Republic | |
| Krebs et al. (2008) |
France | |
| Gautron et al. (2001) |
| C. Derré |
| François Garric collection; EDX ... +1 other reference |
| Godard et al. (2024) |
Germany | |
| Wittern (2001) |
| www.mineralienfreunde-der-pfalz.de (n.d.) |
| Lapis 30 (7/8) |
| Färber (n.d.) | |
| Wittern (2001) |
Greece | |
| Rieck et al. (2018) |
| Rieck et al. (2018) | |
| Kolitsch et al. (2015) +1 other reference |
| Rieck et al. (2018) | |
Greenland | |
| MARKS (2003) |
| Stephenson et al. (1982) |
India | |
| Anantharamu et al. (1995) |
Iran | |
| Sheibi et al. (2016) |
Italy | |
| Bedognè +2 other references |
| Bedognè et al. (2006) |
| Verkaeren et al. (1979) |
| Lecca et al. (2024) |
Japan | |
| |
| Petrov (n.d.) |
| Econ Geol (1980) +1 other reference |
Kyrgyzstan | |
| Pavel M. Kartashov analytical data |
Morocco | |
| Jordi Fabre - Photo ID: 925790 |
| Fabre (n.d.) | |
Namibia | |
| von Bezing (2007) |
| von Bezing (2007) | |
Nigeria | |
| Bennett et al. (1984) +1 other reference |
Norway | |
| Nordrum et al. (2019) |
| Larsen (1993) |
| Braathen et al. (2014) |
Pakistan | |
| Karel Bal specimen |
| Blauwet et al. (2004) |
| Jessie Fisher |
| Ikram Mineraology et al. (ikram@pakistanminerals.com) | |
Poland | |
| Cempa et al. (2024) |
Portugal | |
| Nunes (n.d.) |
Romania | |
| Zajzon et al. (2015) |
| Dumitras et al. (2010) |
| Ciobanu et al. (2004) |
| Ciobanu et al. (2004) | |
Russia | |
| Soloviev et al. (2022) |
| Barkov et al. (2021) |
| Bazai et al. (2009) |
| Ratkin et al. (2021) |
| Soloviev et al. (2011) |
| Ivashchenko et al. (2018, June) |
Slovakia | |
| Koděra (1986) |
| Ružička P. et al. (2017) |
| Koděra (1986) |
| Ďuďa |
| Ozdín D. & Rojkovič I. |
South Africa | |
| Cairncross et al. (2008) |
| Horiuchi et al. (2014) +1 other reference |
| Cairncross et al. (1995) |
South Korea | |
| Choi +5 other references |
Spain | |
| Calvo (2018) |
| Josep Sanchez-Lafuente Mariol ... +1 other reference |
| Romero Silva (2003) |
| Cepedal et al. (2004) |
| Arcos et al. (1996) |
| Timón (2008) |
| 58 (in German) +1 other reference |
| Joan Abella i Creus (2008) |
| Alfonso et al. (2012) |
| Tánago et al. (2012) |
| Oberti +4 other references |
| Sanabria et al. (2002) |
| Sanabria et al. (2002) | |
| Calvo (2009) +1 other reference |
| Calvo (2009) +1 other reference | |
| Calvo (2009) +1 other reference | |
| Calvo (2009) +1 other reference | |
Sweden | |
| Holtstam et al. (2025) |
| Damman et al. (1992) |
| Wilke (1997) |
| Wilke (1997) |
| Wilke (1997) |
| Wilke (1997) | |
| Wilke (1997) | |
| Wilke (1997) | |
| Wilke (1997) | |
| Wilke (1997) | |
| Wilke (1997) | |
| Wilke (1997) | |
| Wilke (1997) | |
| Wilke (1997) | |
| Wilke (1997) | |
| Åberg (2015) |
| Gatedal (n.d.) +1 other reference |
| Gatedal (n.d.) |
Switzerland | |
| |
| |
UK | |
| www.mineralman.f9.co.uk (2001) |
| Tindle.A.G Mineralds of Britian and ... |
Ukraine | |
| Sharygin et al. (2014) |
Uruguay | |
| Prichard et al. (2004) |
USA | |
| Illig (2015) |
| Anthony et al. (1995) |
| Lordo et al. (2002) +1 other reference |
| Dave Bunk specimen |
| Moritz (n.d.) |
| Kring (2000) |
| Windom et al. (1991) |
| Ross (2007) |
| August 2002 +3 other references |
| Runyon (2013) |
| Bradley D. Plotkin collection |
| GATES et al. (2012) |
| The Minerals of Franklin and Ogdensburg |
| Hexiong Yang |
| Rocks & Min. (2007) |
| gsa.confex.com (2008) |
| Robinson et al. (2007) +1 other reference |
| Lupulescu |
| Marian Lupulescu (2010) |
| NY State Museum spec. no. 6898 | |
| Robinson et al. (2007) | |
| speclab.cr.usgs.gov/spectral.lib ... | |
| rruff.geo.arizona.edu (n.d.) |
| P Cristofono collection | |
| Robinson (1996) |
| Mustoe (2024) |
| Mustoe (2024) |
| Mustoe (2024) | |
| Gladwell (2022) |
| Kimball (1984,) +1 other reference |
| Hollister (1982) |
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Shigar Valley, Shigar District, Gilgit-Baltistan, Pakistan