Finnemanite
A valid IMA mineral species - grandfathered
This page is currently not sponsored. Click here to sponsor this page.
About Finnemanite
Karl J. Finneman
Formula:
Pb5(AsO3)3Cl
Colour:
Gray to black; pale olive-green in transmitted light
Lustre:
Sub-Adamantine
Hardness:
2½
Specific Gravity:
7.265
Crystal System:
Hexagonal
Name:
Name in honor of Karl Johan Finneman (1880-1953), of Långban, Sweden, who found the first specimen.
This page provides mineralogical data about Finnemanite.
Unique Identifiers
Mindat ID:
1551
Long-form identifier:
mindat:1:1:1551:2
Similar Names
| Feynmanite | A valid IMA mineral species | Na(UO2)(SO4)(OH) · 3.5H2O |
IMA Classification of Finnemanite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Pb5(As3+O3)3Cl
First published:
1923
Classification of Finnemanite
4.JB.45
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
46.1.1.1
46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO3)pZq
46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO3)pZq
23.9
23 : Arsenites
23 : Arsenites
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Fnn | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Finnemanite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Finnemanite
Sub-Adamantine
Transparency:
Translucent, Opaque
Colour:
Gray to black; pale olive-green in transmitted light
Hardness:
2½ on Mohs scale
Cleavage:
Distinct/Good
On {1011}, distinct
On {1011}, distinct
Density:
7.265 g/cm3 (Measured) 7.35 g/cm3 (Calculated)
Optical Data of Finnemanite
Type:
Uniaxial (-)
RI values:
nω = 2.2949 nε = 2.2847
Max. Birefringence:
δ = 0.010
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
Chemistry of Finnemanite
Mindat Formula:
Pb5(AsO3)3Cl
Element Weights:
Elements listed:
Crystallography of Finnemanite
Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 10.322 Å, c = 7.055 Å
Ratio:
a:c = 1 : 0.683
Unit Cell V:
650.96 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals small, distorted, elongated parallel to [0001], exhibiting {1011} and {0001}; as crystalline crusts.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0015673 | Finnemanite | Effenberger H, Pertlik F (1979) Die kristallstruktur des finnemanits, Pb5Cl(AsO3)3, mit einem vergleich zum strukturtyp des chlorapatits, Ca5Cl(PO4)3 Tschermaks Mineralogische und Petrographische Mitteilungen 26 95-107 | 1979 | Langban, Varmland, Sweden | 0 | 293 | |
| 0012024 | Finnemanite | Effenberger H, Pertlik F (1977) Der strukturtyp von finnemanit, Pb5Cl(AsO3)3 Anzeiger der Osterreichische Akademie der Wissenschaften 114 209-211 | 1977 | Langban, Varmland, Sweden | 0 | 293 | |
| 0012044 | Finnemanite | Gabrielson O (1956) The crystal structure of finnemanite Pb5Cl(AsO3)3 Arkiv for Mineralogi och Geologi 2 1-8 | 1956 | Langban, Varmland, Sweden | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.03 Å | (100) |
| 2.88 Å | (90) |
| 3.35 Å | (60) |
| 2.07 Å | (60) |
| 1.957 Å | (50) |
| 1.924 Å | (50) |
| 1.352 Å | (50) |
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 7: Great Oxidation Event | <2.4 |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47g : [Halogen-bearing surface weathering minerals] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Finnemanite
General Appearance of Type Material:
Thin olive-green flakes.
Place of Conservation of Type Material:
Swedish Museum of Natural History, Stockholm, Sweden.
Geological Setting of Type Material:
Crevices in hematite in a metamorphosed Fe-Mn ore body.
Associated Minerals at Type Locality:
Other Language Names for Finnemanite
Common Associates
Associations Based on Photo Data:
| 2 photos of Finnemanite associated with Lanarkite | Pb2(SO4)O |
| 1 photo of Finnemanite associated with Chalcophanite | ZnMn4+3O7 · 3H2O |
| 1 photo of Finnemanite associated with Willemite | Zn2SiO4 |
| 1 photo of Finnemanite associated with Native Arsenic | As |
| 1 photo of Finnemanite associated with Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
Related Minerals - Strunz-mindat Grouping
| 4.JB. | Cuyaite | Ca2Mn3+As3+14O24Cl |
| 4.JB. | Brattforsite | Mn19(AsO 3)12Cl2 |
| 4.JB.05 | Fetiasite | (Fe3+,Fe2+,Ti)3(As2O5)O2 |
| 4.JB.10 | Manganarsite | Mn3(As2O4)(OH)4 |
| 4.JB.15 | 'UM1984-09-AsO:ClHMn' | Mn10As6O18(OH)Cl |
| 4.JB.15 | Magnussonite | Mn2+10(As3+O3)6(OH,Cl)2 |
| 4.JB.20 | Armangite | Mn2+26(AsO3)14(HAsO3)4(CO3) |
| 4.JB.25 | Nanlingite | Na(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14 |
| 4.JB.30 | Asbecasite | Ca3(Ti,Sn4+)Be2(AsO3)6(SiO4)2 |
| 4.JB.35 | Stenhuggarite | CaFeSb(AsO3)2O |
| 4.JB.40 | Trigonite | Pb3Mn2+(AsO3)2(HAsO3) |
| 4.JB.50 | Gebhardite | Pb8(As2O5)2OCl6 |
| 4.JB.55 | Graeserite | Fe3+4Ti3As3+O13(OH) |
| 4.JB.55 | Tomichite | (V,Fe)4Ti3AsO13(OH) |
| 4.JB.55 | Derbylite | Fe3+4Ti3Sb3+O13(OH) |
| 4.JB.60 | Hemloite | (Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH) |
| 4.JB.65 | Freedite | Cu+Pb8(AsO3)2O3Cl5 |
| 4.JB.70 | Georgiadesite | Pb4(As3+O3)Cl4(OH) |
| 4.JB.75 | Szklaryite | ◻Al6BAs3+3O15 |
| 4.JB.75 | Ekatite | (Fe3+,Fe2+,Zn)12(AsO3)6(AsO3,HSiO4)2(OH)6 |
| 4.JB.85 | Lepageite | Mn2+3(Fe3+7Fe2+4)O3[Sb3+5As3+8O34] |
| 4.JB.90 | Bianchiniite | Ba2(TiV)(As2O5)2OF |
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 Finnemanite
mindat.org URL:
https://www.mindat.org/min-1551.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Finnemanite
Localities for Finnemanite
Showing 9 localities.
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.
Australia | |
| Parbhakar-Fox (2016) |
| Parbhakar-Fox (2016) | |
| Muller (1972) +1 other reference |
Finland | |
| Ilkka Mikkola collection |
Germany | |
| Leonhardt et al. (1991) |
Sweden (TL) | |
| Aminoff (1923) +3 other references |
| Nysten (2003) | |
| Öhman (2003) | |
| Åberg et al. (1986) |
Quick NavTopAbout FinnemaniteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPronunciation Physical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden