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Gruzdevite

A valid IMA mineral species
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02952180017271923449085.jpg
Vyacheslav S. Gruzdev
Formula:
Cu6Hg3Sb4S12
Colour:
Grey-black
Lustre:
Metallic
Hardness:
4 - 4½
Specific Gravity:
5.88 (Calculated)
Crystal System:
Trigonal
Name:
Named in honor of Vyacheslav Sergeyevich Gruzdev (Вячеслав Сергеевич Груздев) (1938-1977), a mineralogist with the Institute of Mineralogy and Geochemistry of Rare Elements (IMGRE), Moscow. He studied antimony-mercury deposits and died during geological research.
Isostructural with:
Aktashite, Nowackiite
Sb analogue of aktashite. HgSb-analogue of nowackiite and zhengminghuaite.


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Unique IdentifiersHide

Mindat ID:
1759
Long-form identifier:
mindat:1:1:1759:2

IMA Classification of GruzdeviteHide

Classification of GruzdeviteHide

Strunz-mindat (2025):
2.GA.30

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
A : Neso-sulfarsenites, etc. without additional S
Dana 8th ed.:
3.4.13.3

3 : SULFOSALTS
4 : ø = 3
Hey's CIM Ref.:
5.4.7

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
4 : Sulpharsenites etc. of Zn and Hg

Mineral SymbolsHide

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

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

Physical Properties of GruzdeviteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Grey-black
Hardness:
4 - 4½ on Mohs scale
Hardness:
VHN35=295(5) kg/mm2 - Vickers
Cleavage:
None Observed
Density:
5.88 g/cm3 (Calculated)

Optical Data of GruzdeviteHide

Anisotropism:
Weak
Reflectivity:
WavelengthR1 (%)
460nm33.1%
540nm32.8%
580nm32.7%
660nm31.9%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 33.1%.
Colour in reflected light:
White

Chemistry of GruzdeviteHide

Mindat Formula:
Cu6Hg3Sb4S12
Element Weights:
Element% weight
Hg32.443 %
Sb26.257 %
S20.744 %
Cu20.555 %

Calculated from ideal end-member formula.
Elements listed:
Cu, Hg, S, Sb - search for minerals with similar chemistry
Common Impurities:
Fe,As

Crystallography of GruzdeviteHide

Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
R3
Cell Parameters:
a = 13.90(2) Å, c = 9.432 Å
Ratio:
a:c = 1 : 0.679
Unit Cell V:
1,578.21 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Massive
Comment:
space group by analogy to aktashite

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.16 Å(100)
1.929 Å(90)
1.645 Å(80)
1.113 Å(60)
1.251 Å(50)
2.12 Å(30)
1.363 Å(30)

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 GruzdeviteHide

Synonyms of GruzdeviteHide

Other Language Names for GruzdeviteHide

German:Gruzdevit
Spanish:Gruzdevita

Relationship of Gruzdevite to other SpeciesHide

Related Minerals - Strunz-mindat GroupingHide

2.GA.PyradoketositeAg3SbS3Mon. 2/m
2.GA.ArsiccioiteAgHg2Tl(As,Sb)2S6Tet. 4 2m : I4 2m
2.GA.EckeriteAg2CuAsS3Mon. 2/m : B2/b
2.GA.05ProustiteAg3AsS3Trig. 3m (3 2/m) : R3c
2.GA.05PyrargyriteAg3SbS3Trig. 3m : R3c
2.GA.10XanthoconiteAg3AsS3Mon. 2/m : B2/b
2.GA.10PyrostilpniteAg3SbS3Mon. 2/m : P21/b
2.GA.15SamsoniteAg4MnSb2S6Mon. 2/m : P21/m
2.GA.20BytíziteCu3SbSe3Orth. mmm (2/m 2/m 2/m) : Pnma
2.GA.20SkinneriteCu3SbS3Mon. 2/m : P21/b
2.GA.20WitticheniteCu3BiS3Orth. 2 2 2 : P21 21 21
2.GA.25LapieiteNiCuSbS3Orth. 2 2 2 : P21 21 21
2.GA.25LisiguangitePtCuBiS3Orth. 2 2 2 : P21 21 21
2.GA.25MalyshevitePdCuBiS3Orth. mmm (2/m 2/m 2/m) : Pmmm
2.GA.25RoterbäritePdBiCuSe3Orth. 2 2 2 : P21 21 21
2.GA.25MückeiteNiCu(Bi,Sb)S3Orth. 2 2 2 : P21 21 21
2.GA.30AktashiteCu6Hg3As4S12Trig. 3 : R3
2.GA.30NowackiiteCu6Zn3As4S12Trig. 3 : R3
2.GA.30ZhengminghuaiteCu6Fe3As4S12Trig. 3 : R3
2.GA.35LaffittiteAgHgAsS3Mon. 2/m
2.GA.40Unnamed (Ag-Fe endmember of Routhierite Group)AgFe2TlAs2S6
2.GA.40RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6Tet. 4 2m : I4 2m
2.GA.40StalderiteTl(Cu,Ag)(Zn,Fe,Hg)2(As,Sb)2S6Tet. 4 2m : I4 2m
2.GA.40RalphcannoniteAgZn2TlAs2S6Tet. 4 2m : I4 2m
2.GA.40FerrostalderiteCuFe2TlAs2S6Tet. 4 2m : I4 2m
2.GA.45ErniggliiteTl2SnAs2S6Trig. 3 : P3
2.GA.50CerromojoniteCuPbBiSe3Orth.
2.GA.50SeligmannitePbCuAsS3Orth. mmm (2/m 2/m 2/m) : Pmmn
2.GA.50SoučekitePbCuBi(S,Se)3Orth. mm2
2.GA.50Unnamed (Pb-Cu-Bi Selenide)PbCuBiSe3
2.GA.50BournonitePbCuSbS3Orth. mm2 : Pmn21
2.GA.55EldragóniteCu6BiSe4(Se2) Orth. mmm (2/m 2/m 2/m)

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 GruzdeviteHide

References for GruzdeviteHide

Localities for GruzdeviteHide

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.
Kyrgyzstan (TL)
 
  • Batken Region
    • Kadamjay District
Spiridonov et al. (1981) +3 other references
...
Mexico
 
  • Sonora
    • Moctezuma Municipality
Lapis 2001 (1)
Excalibur 1983
Mineralogical Society of America - ...
Russia
 
  • Sverdlovsk Oblast
    • Serovsky District
      • Turya river
        • Tur'insk
Stepanov S. Yu. et al. (2017)
Taiwan
 
  • New Taipei City
    • Ruifang District
HENLEY et al. (2012)
USA
 
  • Nevada
Castor et al. (2004)
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