Kryachkoite
A valid IMA mineral species
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About Kryachkoite
Valery Kryachko
Formula:
(Al,Cu)6(Fe,Cu)
Specific Gravity:
3.79 (Calculated)
Crystal System:
Orthorhombic
Name:
Named by C. Ma, C. Lin, L. Luca Bindi, and P.J. Steinhardt in 2017 in honor of Valery Kryachko, Russian prospector who discovered the original samples of the Khatyrka meteorite in 1979.
Unique Identifiers
Mindat ID:
48003
Long-form identifier:
mindat:1:1:48003:5
IMA Classification of Kryachkoite
Classification of Kryachkoite
1.AA.45
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
A : Copper-cupalite family
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
A : Copper-cupalite family
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 |
|---|---|---|
| Kyh | 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 Kryachkoite
Transparency:
Opaque
Comment:
The color, luster, streak, hardness, tenacity, cleavage, fracture, density, and optical properties could not be determined because of the small grain size.
Density:
3.79 g/cm3 (Calculated)
Chemistry of Kryachkoite
Mindat Formula:
(Al,Cu)6(Fe,Cu)
Elements listed:
Crystallography of Kryachkoite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Cmc21
Cell Parameters:
a = 7.460 Å, b = 6.434 Å, c = 8.777 Å
Ratio:
a:b:c = 1.159 : 1 : 1.364
Unit Cell V:
421.3 ų
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.872 Å | (38) |
| 2.242 Å | (61) |
| 2.164 Å | (35) |
| 2.130 Å | (87) |
| 2.061 Å | (46) |
| 2.051 Å | (100) |
| 2.007 Å | (32) |
| 2.001 Å | (62) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
| 6 : Secondary asteroid phases | 4.566-4.560 |
Type Occurrence of Kryachkoite
General Appearance of Type Material:
Occurs as subhedral crystals, 0.5 to 1.2 µm in size.
Place of Conservation of Type Material:
Mineralogical collections of the the Smithsonian Institution’s National Museum of Natural History, Washington DC, USA (registration number USNM 7908)
Geological Setting of Type Material:
Carbonaceous chondrite (CV3) meteorite rich in aluminum.
Associated Minerals at Type Locality:
Synonyms of Kryachkoite
Other Language Names for Kryachkoite
Dutch:Kryachkoiet
German:Kryachkoit
Common Associates
Associations Based on Photo Data:
| 2 photos of Kryachkoite associated with Khatyrkite | (Cu,Zn)Al2 |
| 1 photo of Kryachkoite associated with Stolperite | AlCu |
| 1 photo of Kryachkoite associated with Native Aluminium | Al |
Related Minerals - Strunz-mindat Grouping
| 1.AA. | Jonlarsenite | Al4Cu9 |
| 1.AA. | Pratesiite | AgCuTe2 |
| 1.AA.05 | Native Lead | Pb |
| 1.AA.05a | Auricupride Subgroup | |
| 1.AA.05 | Native Nickel | Ni |
| 1.AA.05 | Native Silver | Ag |
| 1.AA.05 | 'UM2004-08-E:AuCuPd' | Cu2PdAu |
| 1.AA.05 | 'UM1991-06-E:AuCu' | Au3Cu |
| 1.AA.05 | Native Aluminium | Al |
| 1.AA.05 | Steinhardtite | Al0.38Ni0.32Fe0.30 |
| 1.AA.05 | Native Gold | Au |
| 1.AA.05 | Native Copper | Cu |
| 1.AA.05 | Copper Group | |
| 1.AA.10a | Cuproauride | Cu3Au |
| 1.AA.10b | Tetra-auricupride | AuCu |
| 1.AA.10a | Auricupride | Cu3Au |
| 1.AA.10 | Nickel Group | |
| 1.AA.15 | Anyuiite | AuPb2 |
| 1.AA.15 | Novodneprite | AuPb3 |
| 1.AA.15 | 'UM1985-02-E:AlZn' | (Zn,Cu)Al2 |
| 1.AA.15 | Khatyrkite | (Cu,Zn)Al2 |
| 1.AA.20 | Cupalite | (Cu,Zn)Al |
| 1.AA.25 | Hunchunite | Au2Pb |
| 1.AA.30 | Stolperite | AlCu |
| 1.AA.35 | Hollisterite | Al3Fe |
| 1.AA.40 | Icosahedrite | Al63Cu24Fe13 |
| 1.AA.50 | Proxidecagonite | Al34Ni9Fe2 |
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 Kryachkoite
mindat.org URL:
https://www.mindat.org/min-48003.html
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External Links:
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References for Kryachkoite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2016) New minerals and nomenclature modifications approved in 2016, CNMNC Newsletter No. 33. Mineralogical Magazine, 80 (6) 1135-1144 doi:10.1180/minmag.2016.080.085
Localities for Kryachkoite
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) | |
| Hålenius et al. (2016) +2 other references |
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Khatyrka meteorite, Iomrautvaam massif, Anadyrsky District, Chukotka Autonomous Okrug, Russia