Petrovite
A valid IMA mineral species
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Formula:
Na12Cu2(SO4)8
crystallochemical formula: CuNa6-2xCax(SO4)4
Colour:
Blue, green
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.80 (Calculated)
Crystal System:
Monoclinic
Name:
After prof. Tomas Georgievich Petrov (b. 1931), Ph.D., for "his contributions to mineralogy and crystallography and (...) development of industrial technology of fabrication of jewelry malachite".
Chemically similar to saranchinaite and puninite. Interesting, i.a., in terms of NaCu separation / site occupancy.
In the structure there are, i.a., isolated [Cu2(SO4)8]12- clusters.
In the structure there are, i.a., isolated [Cu2(SO4)8]12- clusters.
Unique Identifiers
Mindat ID:
54044
Long-form identifier:
mindat:1:1:54044:3
IMA Classification of Petrovite
Approved
IMA Formula:
Na12Cu2+2(S6+O4)8
First published:
2020
Approval history:
IMA January 2021: Revised formula as Na12Cu2(SO4)8
Classification of Petrovite
7.AC.75
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
C : With medium-sized and large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
C : With medium-sized and large cations
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 |
|---|---|---|
| Pv | 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 Petrovite
Vitreous
Colour:
Blue, green
Streak:
White
Hardness:
4 on Mohs scale
Cleavage:
None Observed
Parting:
None observed.
Fracture:
Conchoidal
Density:
2.80 g/cm3 (Calculated)
Comment:
Calculated density based on the empirical formula and single-crystal unit-cell parameters.
Optical Data of Petrovite
Type:
Biaxial (+)
RI values:
nα = 1.498(3) nβ = 1.500 nγ = 1.516(3)
2V:
Measured: 20° (10)
Max. Birefringence:
δ = 0.018
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Dispersion:
None.
Pleochroism:
Not Visible
Chemistry of Petrovite
Mindat Formula:
Na12Cu2(SO4)8
crystallochemical formula: CuNa6-2xCax(SO4)4
crystallochemical formula: CuNa6-2xCax(SO4)4
Element Weights:
Elements listed:
Crystallography of Petrovite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 12.615(2) Å, b = 9.026(1) Å, c = 12.717(2) Å
β = 108.311(3)°
β = 108.311(3)°
Ratio:
a:b:c = 1.398 : 1 : 1.409
Unit Cell V:
1,374.68 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 11.59 Å | (61) |
| 7.27 Å | (38) |
| 4.54 Å | (33) |
| 3.88 Å | (75) |
| 3.68 Å | (52) |
| 3.11 Å | (36) |
| 2.623 Å | (100) |
| 1.931 Å | (35) |
Comments:
Tolbachik volcano, Kamchatka, Russia. Data from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] |
Type Occurrence of Petrovite
General Appearance of Type Material:
Tabular crystals, up to 0.2 mm, often bearing gaseous inclusions, that are intergrown into globular aggregates.
Place of Conservation of Type Material:
Collections of the Mineralogical Museum of Saint-Petersburg State University, University Emb. 7/9, St. Petersburg 199034, Russia, catalogue number 1/19696.
Geological Setting of Type Material:
Volcanic fumarole at a temperature of ∼200°C.
Associated Minerals at Type Locality:
Other Language Names for Petrovite
Related Minerals - Strunz-mindat Grouping
| 7.AC. | Aluminopyracmonite | (NH4)3Al(SO4)3 |
| 7.AC. | Amgaite | Tl+32Te6+O6 |
| 7.AC.05 | Vanthoffite | Na6Mg(SO4)4 |
| 7.AC.08 | Pyracmonite | (NH4)3Fe(SO4)3 |
| 7.AC.10 | Langbeinite | K2Mg2(SO4)3 |
| 7.AC.10 | Efremovite | (NH4)2Mg2(SO4)3 |
| 7.AC.10 | Ferroefremovite | (NH4)2Fe2+2(SO4)3 |
| 7.AC.10 | Manganolangbeinite | K2Mn2(SO4)3 |
| 7.AC.15 | Yavapaiite | KFe3+(S6+O4)2 |
| 7.AC.15 | Eldfellite | NaFe3+(SO4)2 |
| 7.AC.20 | Sabieite | (NH4)Fe3+(SO4)2 |
| 7.AC.20 | Godovikovite | (NH4)Al(SO4)2 |
| 7.AC.20 | Steklite | KAl(SO4)2 |
| 7.AC.35 | Aphthitalite | K3Na(SO4)2 |
| 7.AC.35 | Belomarinaite | KNa(SO4) |
| 7.AC.35 | Natroaphthitalite | KNa3(SO4)2 |
| 7.AC.35 | Möhnite | (NH4)K2Na(SO4)2 |
| 7.AC.40 | Itelmenite | Na4Mg3Cu3(SO4)8 |
| 7.AC.45 | Saranchinaite | Na2Cu(SO4)2 |
| 7.AC.50 | Majzlanite | K2Na(ZnNa)Ca(SO4)4 |
| 7.AC.60 | Philoxenite | (K,Na,Pb)4(Na,Ca)2(Mg,Cu)3(Fe3+0.5Al0.5)(SO4)8 |
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 Petrovite
mindat.org URL:
https://www.mindat.org/min-54044.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Petrovite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) - Newsletter 52. European Journal of Mineralogy, 32 (1) 1-11 doi:10.5194/ejm-32-1-2020
Filatov, Stanislav K.; Shablinskii, Andrey P.; Krivovichev, Sergey V.; Vergasova, Lidiya P.; Moskaleva, Svetlana V. (2020) Petrovite, Na10CaCu2(SO4)8, a new fumarolic sulfate from the Great Tolbachik fissure eruption, Kamchatka Peninsula, Russia. Mineralogical Magazine, 84 (5). p.691-698. doi:10.1180/mgm.2020.53
Localities for Petrovite
Showing 1 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.
Russia (TL) | |
| Miyawaki et al. (2020) |
