Isselite
A valid IMA mineral species
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About Isselite
Arturo Issel
Formula:
Cu6(SO4)(OH)10(H2O)4 · H2O
Contains probably essential minor Ni, Co and Zn.
Colour:
Blue
Lustre:
Vitreous
Specific Gravity:
3.00
Crystal System:
Orthorhombic
Name:
Dedicated to Arturo Issel (11 April 1842, Genoa, Italy – 27 November 1922, Genoa, Italy) for his pioneering work on the geology, palaeontology and mineralogy of Italy, with a special reference to Liguria (Issel, 1892). He was professor of Geology and Mineralogy at the University of Genoa beginning in 1866 and Director of the Institute of Geology and the Geological Museum until 1917.
The Cu analogue of guarinoite in terms of chemistry and chemically related to montetrisaite and redgillite.
"The actual role of Ni in stabilising this phase deserves further study" (Biagioni et al., 2020).
"The actual role of Ni in stabilising this phase deserves further study" (Biagioni et al., 2020).
Unique Identifiers
Mindat ID:
53412
Long-form identifier:
mindat:1:1:53412:3
IMA Classification of Isselite
Approved
Approval year:
2019
First published:
2020
Type description reference:
Biagioni, Cristian, Belmonte, Donato, Carbone, Cristina, Cabella, Roberto, Demitri, Nicola, Perchiazzi, Natale, Kampf, Anthony R., Bosi, Ferdinando (2020) Isselite, Cu6(SO4)(OH)10(H2O)4⋅H2O, a new mineral species from Eastern Liguria, Italy. Mineralogical Magazine, 84 (5) 653-661 doi:10.1180/mgm.2020.50
Classification of Isselite
7.DD.40
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
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 |
|---|---|---|
| Iss | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Isselite
Vitreous
Transparency:
Transparent
Colour:
Blue
Streak:
Light blue
Hardness Data:
Could not be measured
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good cleavage on {001} and {100}.
Good cleavage on {001} and {100}.
Fracture:
Irregular/Uneven
Density:
3.00(2) g/cm3 (Measured) 2.946 g/cm3 (Calculated)
Comment:
Calculated value based on empirical formula.
Optical Data of Isselite
Type:
Biaxial (-)
RI values:
nα = 1.599(2) nβ = 1.633(2) nγ = 1.647(2)
2V:
Measured: 63.6° (5)
Max. Birefringence:
δ = 0.048
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:
moderate, with r > v.
Pleochroism:
Visible
Comments:
X = light blue, Y = blue, Z = blue
Comments:
Optical orientation: X = b, Y = c and Z = a.
Absorption: X << Z < Y.
Absorption: X << Z < Y.
Chemistry of Isselite
Mindat Formula:
Cu6(SO4)(OH)10(H2O)4 · H2O
Contains probably essential minor Ni, Co and Zn.
Contains probably essential minor Ni, Co and Zn.
Element Weights:
Elements listed:
Crystallography of Isselite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pmn21
Cell Parameters:
a = 6.807(1) Å, b = 5.897(1) Å, c = 20.654(4) Å
Ratio:
a:b:c = 1.154 : 1 : 3.502
Unit Cell V:
829.07 ų (Calculated from Unit Cell)
Z:
6
Morphology:
Acicular crystals, striated parallel to [100] and tabular on {001}. Observed forms are {001}, {010}, {103} and {103}.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.3 Å | (s) |
| 6.4 Å | (m) |
| 5.67 Å | (mw) |
| 4.84 Å | (vs) |
| 3.400 Å | (mw) |
| 2.708 Å | (s) |
| 2.225 Å | (m) |
| 2.179 Å | (mw) |
Reference:
Biagioni, Cristian, Belmonte, Donato, Carbone, Cristina, Cabella, Roberto, Demitri, Nicola, Perchiazzi, Natale, Kampf, Anthony R., Bosi, Ferdinando (2020) Isselite, Cu6(SO4)(OH)10(H2O)4⋅H2O, a new mineral species from Eastern Liguria, Italy. Mineralogical Magazine, 84 (5) 653-661 doi:10.1180/mgm.2020.50
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] |
Type Occurrence of Isselite
General Appearance of Type Material:
Sprays of blue acicular crystals, up to 0.1 mm long.
Place of Conservation of Type Material:
Mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (Pisa, Italy), catalogue number 19904 (holotype), the Dipartimento di Scienze della Terra, dell’Ambiente e della Vita (DISTAV), Università di Genova, Corso Europa 26, Genova, Italy, catalogue number MO484 (holotype); the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 67195 (cotype).
Associated Minerals at Type Locality:
Reference:
Biagioni, Cristian, Belmonte, Donato, Carbone, Cristina, Cabella, Roberto, Demitri, Nicola, Perchiazzi, Natale, Kampf, Anthony R., Bosi, Ferdinando (2020) Isselite, Cu6(SO4)(OH)10(H2O)4⋅H2O, a new mineral species from Eastern Liguria, Italy. Mineralogical Magazine, 84 (5) 653-661 doi:10.1180/mgm.2020.50
Other Language Names for Isselite
Related Minerals - Strunz-mindat Grouping
| 7.DD. | Asagiite | NiCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.05 | Felsőbányaite | Al4(SO4)(OH)10 · 4H2O |
| 7.DD.07 | Llantenesite | Cu6Al[SeO4](OH)12Cl · 3H2O |
| 7.DD.10 | Langite | Cu4(SO4)(OH)6 · 2H2O |
| 7.DD.10 | Fehrite | MgCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.10 | Posnjakite | Cu4(SO4)(OH)6 · H2O |
| 7.DD.10 | Wroewolfeite | Cu4(SO4)(OH)6 · 2H2O |
| 7.DD.10 | Gobelinite | CoCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.15 | Kobyashevite | Cu5(SO4)2(OH)6 · 4H2O |
| 7.DD.15 | Spangolite | Cu6Al(SO4)(OH)12Cl · 3H2O |
| 7.DD.15 | Unnamed (Dimorph of Devilline) | CaCu4(SO4)2(OH)6 · 3H2O |
| 7.DD.20 | Ktenasite | ZnCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.25 | Christelite | Cu2Zn3(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Edwardsite | Cu3Cd2(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Niedermayrite | CdCu4(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Serpierite | Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O |
| 7.DD.30 | Campigliaite | Mn2+Cu4(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Orthoserpierite | Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O |
| 7.DD.30 | Devilline | CaCu4(SO4)2(OH)6 · 3H2O |
| 7.DD.35 | Shigaite | Mn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O |
| 7.DD.35 | Zincaluminite | (Zn1-xAlx)(SO4)x/2(OH)2 · nH2O |
| 7.DD.35 | Zincowoodwardite | Zn1-xAlx(OH)2[SO4]x/2 · nH2O |
| 7.DD.35 | Natroglaucocerinite | Zn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O |
| 7.DD.35 | Hydrowoodwardite | (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O |
| 7.DD.35 | Honessite | (Ni1-xFe3+x)(OH)2[SO4]x/2 · nH2O |
| 7.DD.35 | Carrboydite | (Ni1-xAlx)(SO4)x/2(OH)2 · nH2O |
| 7.DD.35 | Glaucocerinite | (Zn1-xAlx)(OH)2(SO4)x/2 · nH2O |
| 7.DD.35 | Wermlandite | Mg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O |
| 7.DD.35 | Nikischerite | Fe2+6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O |
| 7.DD.35 | Hydrohonessite | (Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2O |
| 7.DD.35 | Woodwardite | Cu1-xAlx(OH)2(SO4)x/2 · nH2O |
| 7.DD.35 | Motukoreaite | Mg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O |
| 7.DD.35 | Mountkeithite | [(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2O |
| 7.DD.40 | Lawsonbauerite | (Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O |
| 7.DD.40 | Torreyite | (Mg,Mn2+)7◻2Mn2+2Zn4(SO4)2(OH)22 · 8H2O |
| 7.DD.45 | Mooreite | Mg9◻2Mn2Zn4(SO4)2(OH)26 · 8H2O |
| 7.DD.45 | Hodgesmithite | (Cu,Zn)6Zn(SO4)2(OH)10 · 3H2O |
| 7.DD.47 | Lahnsteinite | Zn4(SO4)(OH)6 · 3H2O |
| 7.DD.50 | Namuwite | Zn4(SO4)(OH)6 · 4H2O |
| 7.DD.50 | Minohlite | (Cu,Zn)7(SO4)2(OH)10 · 8H2O |
| 7.DD.52 | Lauraniite | Cu6Cd2(SO4)2(OH)12 · 5H2O |
| 7.DD.55 | Bechererite | Zn7Cu(OH)13[(SiO(OH)3(SO4)] |
| 7.DD.60 | Ramsbeckite | (Cu,Zn)15(SO4)4(OH)22 · 6H2O |
| 7.DD.65 | Vonbezingite | Ca6Cu3(SO4)3(OH)12 · 2H2O |
| 7.DD.70 | Redgillite | Cu6(SO4)(OH)10 · H2O |
| 7.DD.75 | Nickelalumite | NiAl4(SO4)(OH)12(H2O)3 |
| 7.DD.75 | Kyrgyzstanite | ZnAl4(SO4)(OH)12 · 3H2O |
| 7.DD.75 | Chalcoalumite | CuAl4(SO4)(OH)12 · 3H2O |
| 7.DD.80 | Schulenbergite | (Cu,Zn)7(SO4)2(OH)10 · 3H2O |
| 7.DD.80 | UM1992-30-SO:CCuHZn | (Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2O |
| 7.DD.80 | Thérèsemagnanite | NaCo4(SO4)(OH)6Cl · 6H2O |
| 7.DD.80 | Guarinoite | Zn6(SO4)(OH)10 · 5H2O |
| 7.DD.85 | Montetrisaite | Cu6(SO4)(OH)10 · 2H2O |
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 Isselite
mindat.org URL:
https://www.mindat.org/min-53412.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Isselite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2019) New minerals and nomenclature modifications approved in 2019. CNMNC Newsletter No 48. Mineralogical Magazine, 83 (2) 315-317 doi:10.1180/mgm.2019.23
Biagioni, Cristian, Belmonte, Donato, Carbone, Cristina, Cabella, Roberto, Demitri, Nicola, Perchiazzi, Natale, Kampf, Anthony R., Bosi, Ferdinando (2020) Isselite, Cu6(SO4)(OH)10(H2O)4⋅H2O, a new mineral species from Eastern Liguria, Italy. Mineralogical Magazine, 84 (5) 653-661 doi:10.1180/mgm.2020.50
Localities for Isselite
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.
Italy (TL) | |
| Biagioni et al. (2020) |
| Castellaro-Kampf |
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Lagoscuro mine, Case Lagoscuro, Livellato, Ceranesi, Genoa, Liguria, Italy