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Mgriite

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05517370014948303605094.jpg
Russian State Geological Prospecting University
Formula:
Cu3AsSe3
Colour:
Gray with a brownish tint in reflected light.
Hardness:
4½ - 5
Name:
Named by Yu.M. Dymkov, T.I. Loseva, E.N. Zavyalov, B.I. Ryzhov, and L.I. Bocheck in 1982 in honor of the Moscow Geological Exploration Institute (Moskovskogo Geologro Razvedounogo Instituta or MGRI) the institute where the mineral was discovered. The institute is now named the Russian State Geological Prospecting University.
See also Chaméanite.


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Classification of MgriiteHide

Approved
2.LA.45

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
A : Without essential Pb
3.4.7.2

3 : SULFOSALTS
4 : ø = 3
3.1.21

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
1 : Sulphides etc. of Cu

Physical Properties of MgriiteHide

Colour:
Gray with a brownish tint in reflected light.
Hardness:
4½ - 5 on Mohs scale
Hardness:
VHN20=287 - 379 kg/mm2 (15 s test time) - Vickers
Tenacity:
Brittle
Cleavage:
None Observed

Chemical Properties of MgriiteHide

Formula:
Cu3AsSe3
IMA Formula:
(Cu,Fe)3AsSe3
Common Impurities:
Fe

Type Occurrence of MgriiteHide

Synonyms of MgriiteHide

Other Language Names for MgriiteHide

German:Mgriit
Spanish:Mgriita

Related Minerals - Nickel-Strunz GroupingHide

2.LA.10DervilliteAg2AsS2Mon. 2/m : P2/b
2.LA.15DaomaniteCuPtAsS2Orth.
2.LA.20VaughaniteTlHgSb4S7Tric.
2.LA.25CriddleiteTlAg2Au3Sb10S10Mon.
2.LA.30Fettelite[Ag6As2S7][Ag10HgAs2S8] Mon. 2 : B2
2.LA.35Chaméanite(Cu,Fe)4As(Se,S)4Iso.
2.LA.40ArcubisiteAg6CuBiS4
2.LA.50Benleonardite[Ag6(Sb,As)2S6Te] [Ag9Cu(S,Te)2Te2]Trig. 3m (3 2/m) : P3m1
2.LA.55TsnigriiteAg9SbTe3S3Mon.
2.LA.60BorovskitePd3SbTe4Iso.
2.LA.65JonassoniteAuBi5S4Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

3.1.1ChalcociteCu2SMon. 2/m : P21/b
3.1.2DjurleiteCu31S16Mon. 2/m
3.1.3DigeniteCu9S5Trig. 3m (3 2/m) : R3m
3.1.4AniliteCu7S4Orth. mmm (2/m 2/m 2/m) : Pnma
3.1.5RoxbyiteCu9S5Tric. 1 : P1
3.1.6SpionkopiteCu39S28Trig.
3.1.7GeeriteCu8S5Trig. 3
3.1.8CovelliteCuSHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.1.9BerzelianiteCu2SeIso. m3m (4/m 3 2/m) : Fm3m
3.1.10BellidoiteCu2SeTet. 4/m : P42/n
3.1.11UmangiteCu3Se2Tet.
3.1.12YarrowiteCu9S8Trig.
3.1.13AthabascaiteCu5Se4Orth.
3.1.14KlockmanniteCuSeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.1.15Krut'aiteCuSe2Iso. m3 (2/m 3) : Pa3
3.1.16WeissiteCu2-xTeHex.
3.1.17RickarditeCu7Te5Orth.
3.1.18VulcaniteCuTeOrth.
3.1.19BambollaiteCu(Se,Te)2Tet.
3.1.20LautiteCuAsSOrth. mmm (2/m 2/m 2/m) : Pnma
3.1.22CubaniteCuFe2S3Orth. mmm (2/m 2/m 2/m)
3.1.23BorniteCu5FeS4Orth. mmm (2/m 2/m 2/m) : Pbca
3.1.24FukuchiliteCu3FeS8Iso. m3 (2/m 3) : Pa3
3.1.25ChalcopyriteCuFeS2Tet. 4 2m : I4 2d
3.1.26MooihoekiteCu9Fe9S16Tet.
3.1.27HaycockiteCu4Fe5S8Orth. 2 2 2
3.1.28IsocubaniteCuFe2S3Iso. m3m (4/m 3 2/m) : Fm3m
3.1.29IdaiteCu5FeS6Hex.
3.1.30NukundamiteCu3.33Fe0.66S4Trig. 3m (3 2/m) : P3m1
3.1.31PutoraniteCu1.1Fe1.2S2Iso.
3.1.32Orickite2CuFeS2 · H2OHex.
3.1.33EskeborniteCuFeSe2Tet.
3.1.34Chaméanite(Cu,Fe)4As(Se,S)4Iso.
3.1.35TalnakhiteCu9(Fe,Ni)8S16Iso. 4 3m : I4 3m

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.

References for MgriiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Annamamedov, R., Berger, L.I., Petrov, V.M., Slobodchikov, S.V. (1966) Electrical, optical, and physicochemical properties of a number of semiconductors of the A3(1)B(V)C4(VI) type. Doklady Akademii Nauk SSSR: 166: 1195-1198.
Imamov, R.M., Petrov, I.I. (1968) Electron-diffraction study of the semiconducting compound CuAsSe2. Soviet Physics - Crystallography: 13: 335-338.
Dymkov, Y.M., Loseva, T.I., Zavyalov, E.N., Ryzhov, B.I., Bocheck, L.I. (1982) Mgriit, Cu3AsSe3, novyi mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 111: 215-219. (in Russian)
Fleischer, M., Pabst, A. (1983) New mineral names. American Mineralogist: 68: 280-283.
Majid, C., Hussain, M. (1987) Crystal data for ternary compounds of the system Cu-As2Se3. Journal of Applied Crystallography: 20: 323.
Bayliss, P. (1990) Revised unit cell dimensions, space group, and chemical formula of some metallic minerals. The Canadian Mineralogist: 28: 751-755.
Dymkov, Y.M., Ryzhov, B.I., Begizov, V.I., Dubakina, L.S., Zav'yalov, E.N., Ryabeva, V.G., Tsvetkova, M.V. (1991) Mgriite, bismuth petrovicite and associated selenides from carbonate veins of the Erzgebirge. Novye Dannye o Mineralakh: 37: 81-101. (in Russian)
Jambor, J.L., Burke, E.A.J. (1991) New mineral names. American Mineralogist: 76: 2020-2026.
Jambor, J.L., Pertsev, N.N., Roberts, A.C. (1995) New mineral names. American Mineralogist: 80: 845-850.

Internet Links for MgriiteHide

Localities for MgriiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany (TL)
 
  • Saxony
American Mineralogist (1983): 68: 280-281; Dymkov, Yu. M.; Ryzhov, B. I.; Begizov, V. I.; Dubakina, L. S.; Zav'yalov, E. N.; Ryabeva, V. G.; Tsvetkova, M. V. (1991): Mgriite, bismuth petrovicite and associated selenides from carbonate veins of the Erzgebirge. Novye Dannye o Mineralakh 37, 81-101 (in Russian).
 
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