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Kravtsovite

A valid IMA mineral species
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07988410017271953164901.jpg
Kravtsovite, etc.

Komsomol'skii Mine, Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia
07988410017271953164901.jpg
Kravtsovite, etc.

Komsomol'skii Mine, Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia
07988410017271953164901.jpg
Kravtsovite, etc.

Komsomol'skii Mine, Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia
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About KravtsoviteHide

Formula:
PdAg2S
Colour:
Yellowish white in plane-polarised light
Lustre:
Metallic
Specific Gravity:
8.73 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honour of V.F. Kravtsov, one of the discoverers of the Talnakh and Oktyabrsk deposits in the Noril’sk district of Russia.
A platinum-group mineral (PGM).


Unique IdentifiersHide

Mindat ID:
51469
Long-form identifier:
mindat:1:1:51469:7

Similar NamesHide

KrasnoviteA valid IMA mineral speciesBa(Al,Mg)(PO4,CO3)(OH)2 · H2O
KrásnoiteA valid IMA mineral speciesCa3Al7.7Si3P4O23.5(OH)12.1F2 · 8H2O

IMA Classification of KravtsoviteHide

Classification of KravtsoviteHide

Strunz-mindat (2026):
2.BC.37

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
C : With Rh, Pd, Pt, etc.

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
KvtIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of KravtsoviteHide

Lustre:
Metallic
Colour:
Yellowish white in plane-polarised light
Streak:
Grey
Tenacity:
Brittle
Density:
8.73 g/cm3 (Calculated)

Optical Data of KravtsoviteHide

Anisotropism:
Strong with rotation tints of salmon-pink, orange, pale blue and dark blue–black
Bireflectance:
Strong
Reflectivity:
WavelengthR1 (%)R2 (%)
400nm30.6%37.0%
440nm31.5%38.0%
470nm32.2%38.8%
500nm32.5%39.2%
520nm32.4%39.2%
546nm31.6%39.4%
560nm31.2%39.5%
589nm30.2%39.8%
620nm29.5%40.3%
650nm28.8%41.1%
680nm28.2%41.8%
700nm27.8%42.3%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 42.3%.
R1 shown in black, R2 shown in red
Internal Reflections:
None
Pleochroism:
Strong
Comments:
in shades of slightly yellowish white to bluish grey.

Chemistry of KravtsoviteHide

Mindat Formula:
PdAg2S
Element Weights:
Element% weight
Ag60.904 %
Pd30.043 %
S9.052 %

Calculated from ideal end-member formula.
Elements listed:
Ag, Pd, S - search for minerals with similar chemistry

Crystallography of KravtsoviteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Cmcm
Setting:
Cmcm
Cell Parameters:
a = 7.9835(1) Å, b = 5.9265(1) Å, c = 5.7451(1) Å
Ratio:
a:b:c = 1.347 : 1 : 0.969
Unit Cell V:
271.82 ų
Z:
4

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of KravtsoviteHide

Type Locality:
ⓘ Komsomol'skii Mine, Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia
General Appearance of Type Material:
As equant inclusions (ranging in size from a few μm to 40–50 μm) in silicates and pyrite intergrown with vysotskite and Au–Ag alloy in aggregates (100–200 μm across).
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Department of Earth Sciences, Natural History Museum, London, UK, catalogue number BM 2016,150
Associated Minerals at Type Locality:
BraggiteCooperiteInsizwaiteKotulskiteMalyshevite
MoncheitePyriteSobolevskiteSopcheiteStibiopalladinite
TelargpaliteVysotskite
Reference:
Vymazalová, Anna, Laufek, František, Sluzhenikin, Sergei F., Stanley, Chris J., Kozlov, Vladimir V., Chareev, Dmitry A., Lukashova, Maria L. (2017) Kravtsovite, PdAg2S, a new mineral from the Noril'sk-Talnakh deposit, Krasnoyarskiy kray, Russia. European Journal of Mineralogy, 29 (4) 597-602 doi:10.1127/ejm/2017/0029-2653

Synonyms of KravtsoviteHide

Other Language Names for KravtsoviteHide

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Kravtsovite associated with GalenaPbS
1 photo of Kravtsovite associated with ChalcopyriteCuFeS2
1 photo of Kravtsovite associated with DiopsideCaMgSi2O6

Related Minerals - Strunz-mindat GroupingHide

2.BC.PanskyitePd9Ag2Pb2S4Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BC.FleetiteCu2RhIrSb2Iso. m3m(4/m32/m) : Fd3m
2.BC.ColdwellitePd3Ag2SIso. 432 : P4332
2.BC.'UM2004-45-Se:AgHgPd'(Ag,Cu)6Hg2Pd2Se3
2.BC.05'UM2000-47-S:CuFePdPt'PtPd(Fe,Cu)S
2.BC.05MiassiteRh17S15Iso. m3m(4/m32/m) : Pm3n
2.BC.05PalladseitePd17Se15Iso. m3m(4/m32/m)
2.BC.10Oosterboschite(Pd,Cu)7Se5Orth.
2.BC.15ChrisstanleyiteAg2Pd3Se4Mon. 2/m : P21/b
2.BC.15JagüéiteCu2Pd3Se4Mon. 2/m : P21/b
2.BC.20KeithconnitePd20Te7Trig. 3 : R3
2.BC.25Vasilite(Pd,Cu)16(S,Te)7Iso. 43m : I43m
2.BC.30TelluropalladinitePd9Te4Mon. 2/m : P21/b
2.BC.35KojonenitePd7-xSnTe2 (0.3 ≤ x ≤ 0.8)Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BC.35LuberoitePt5Se4Mon. 2/m : P21/b
2.BC.40Oulankaite(Pd,Pt)5(Cu,Fe)4SnTe2S2Tet.
2.BC.40LukkulaisvaaraitePd14Ag2Te9Tet. 4/m : I4/m
2.BC.42MonchetundraitePd2NiTe2Orth. mmm(2/m2/m2/m) : Ibam
2.BC.45Telargpalite(Pd,Ag)3(Te,Bi)Iso.
2.BC.45ThalhammeritePd9Ag2Bi2S4Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BC.47VymazalováitePd3Bi2S2Iso. 23 : I213
2.BC.50TemagamitePd3HgTe3Trig. 3m : P3m1
2.BC.55BowlesitePtSnSOrth. mm2 : Pca21
2.BC.55SopcheiteAg4Pd3Te4Orth.
2.BC.60LaflammeitePd3Pb2S2Mon. 2/m : B2/m
2.BC.65TischendorfitePd8Hg3Se9Orth.

Other InformationHide

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 KravtsoviteHide

References for KravtsoviteHide

Localities for KravtsoviteHide

Showing 2 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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Locality ListHide

- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada
 
  • Ontario
    • Thunder Bay District
      • Coldwell complex
Ames et al. (2017)
Russia (TL)
 
  • Krasnoyarsk Krai
    • Taymyrskiy Autonomous Okrug
      • Taimyr Peninsula
        • Norilsk-Talnakh Mining Region
          • Talnakh Cu-Ni Deposit
CNMNC Newsletter No. 35 +2 other references
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