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.

Type Locality:

ⓘ Khatyrka meteorite, Iomrautvaam massif, Anadyrsky District, Chukotka Autonomous Okrug, Russia

Chemically similar to hollisterite and somewhat to icosahedrite. Known synthetic analogue.

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Unique IdentifiersHide

Mindat ID:

48003

Long-form identifier:

mindat:1:1:48003:5

GUID
(UUID V4):

d3b40db8-129f-46e6-b7fd-10859c3d69f9

IMA Classification of KryachkoiteHide

IMA status:

Approved

Approval year:

2016

First published:

2017

Classification of KryachkoiteHide

Strunz-mindat (2024):

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

Mineral SymbolsHide

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

Symbol	Source	Reference
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 KryachkoiteHide

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 KryachkoiteHide

Mindat Formula:

(Al,Cu)₆(Fe,Cu)

Elements listed:

Al, Cu, Fe - search for minerals with similar chemistry

Crystallography of KryachkoiteHide

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 Å³

X-Ray Powder DiffractionHide

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 EnvironmentHide

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 KryachkoiteHide

Type Locality:

ⓘ Khatyrka meteorite, Iomrautvaam massif, Anadyrsky District, Chukotka Autonomous Okrug, Russia

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:

Khatyrkite

Aluminium

Synonyms of KryachkoiteHide

IMA2016-062

Related Minerals - Strunz-mindat Grouping Hide

1.AA.05	Aluminium	Al	Iso. m3m (4/m 3 2/m) : Fm3m
1.AA.05	Copper	Cu	Iso. m3m (4/m 3 2/m) : Fm3m
1.AA.05	Gold	Au	Iso. m3m (4/m 3 2/m) : Fm3m
1.AA.05	Lead	Pb	Iso. m3m (4/m 3 2/m) : Fm3m
1.AA.05	Nickel	Ni	Iso. m3m (4/m 3 2/m) : Fm3m
1.AA.05	Silver	Ag	Iso. m3m (4/m 3 2/m) : Fm3m
1.AA.05	UM2004-08-E:AuCuPd	Cu₂PdAu
1.AA.05	UM1991-06-E:AuCu	Au₃Cu
1.AA.05	Copper Group
1.AA.05	Steinhardtite	Al_0.38Ni_0.32Fe_0.30	Iso. m3m (4/m 3 2/m) : Im3m
1.AA.05a	Auricupride Subgroup
1.AA.10a	Auricupride	Cu₃Au	Iso. m3m (4/m 3 2/m) : Pm3m
1.AA.10b	Tetra-auricupride	AuCu	Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm
1.AA.10a	Cuproauride	Cu₃Au
1.AA.10	Nickel Group
1.AA.15	Anyuiite	AuPb₂	Tet. 4/mmm (4/m 2/m 2/m) : I4/mcm
1.AA.15	Khatyrkite	(Cu,Zn)Al₂	Tet. 4/mmm (4/m 2/m 2/m) : I4/mcm
1.AA.15	Novodneprite	AuPb₃	Tet. 4 2m : I4 2m
1.AA.15	UM1985-02-E:AlZn	(Zn,Cu)Al₂
1.AA.20	Cupalite	(Cu,Zn)Al	Orth.
1.AA.25	Hunchunite	Au₂Pb	Iso. m3m (4/m 3 2/m)
1.AA.30	Stolperite	AlCu	Iso. m3m (4/m 3 2/m) : Pm3m
1.AA.35	Hollisterite	Al₃Fe	Mon. 2/m : B2/m
1.AA.40	Icosahedrite	Al₆₃Cu₂₄Fe₁₃	Icos. 5 3m : Fm 3 5
1.AA.50	Proxidecagonite	Al₃₄Ni₉Fe₂	Orth. mmm (2/m 2/m 2/m) : Pnma

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 KryachkoiteHide

mindat.org URL:

https://www.mindat.org/min-48003.html
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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for KryachkoiteHide

Reference List:

www.its.caltech.edu (n.d.) http://www.its.caltech.edu/chima/

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

Ma, C., Lin, C., Luca Bindi, L., Steinhardt, P.J. (2017) Hollisterite (Al3Fe), kryachkoite (Al,Cu)6(Fe,Cu), and stolperite (AlCu): Three new minerals from the Khatyrka CV3 carbonaceous chondrite. American Mineralogist: 102: 690-693.

(2023) Kryachkoite. Handbook of Mineralogy. Mineralogical Society of America

Localities for KryachkoiteHide

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.

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.

Russia (TL)

Chukotka Autonomous Okrug

Anadyrsky District

Iomrautvaam massif

ⓘ Khatyrka meteorite (TL)

Mineralogical Magazine: 80: 1135–1144 +2 other references

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Kryachkoite