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Giraudite-(Zn)

A valid IMA mineral species
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07166050017271923379696.jpg
Giraudite-(Zn)

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
07166050017271923379696.jpg
Giraudite-(Zn)

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
07166050017271923379696.jpg
Giraudite-(Zn)

Chaméane Uranium Deposit, Le Vernet-Chaméane, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
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About Giraudite-(Zn)Hide

Formula:
Cu6(Cu4Zn2)As4Se12Se
Giraudite-(Zn) is re-named from "giraudite" according to the new tetrahedrite group nomenclature of Biagione et al., 2020. The IMA formula presented here has not yet been updated to reflect the observation of Zn>Fe2+ in the type material.
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
5.75 (Calculated)
Crystal System:
Isometric
Name:
Named giraudite (without the suffix) in honor of Roger Giraud (1936– ), electron microprobe laboratory, BRGM-CNRS, Orleans, France. The suffix was added by the IMA, according to the new tetrahedrite group nomenclature of Biagione et al. (2020).
This page provides mineralogical data about Giraudite-(Zn).


Unique IdentifiersHide

Mindat ID:
1698
Long-form identifier:
mindat:1:1:1698:4

Similar NamesHide

GirditeA discredited species nameH2Pb3(Te4+O3)(Te6+O6)

IMA Classification of Giraudite-(Zn)Hide

Classification of Giraudite-(Zn)Hide

Strunz-mindat (2026):
2.GB.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
B : Neso-sulfarsenites, etc. with additional S
Dana 8th ed.:
3.3.6.5

3 : SULFOSALTS
3 : 3 <ø < 4
Hey's CIM Ref.:
5.1.11

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

Mineral SymbolsHide

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

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference for Standard
Gir-ZnIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
GirThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of Giraudite-(Zn)Hide

Lustre:
Metallic
Transparency:
Opaque
Hardness:
3½ - 4 on Mohs scale
Hardness:
VHN25=233 - 333 kg/mm2 - Vickers
Density:
5.75 g/cm3 (Calculated)

Chemistry of Giraudite-(Zn)Hide

Mindat Formula:
Cu6(Cu4Zn2)As4Se12Se

Giraudite-(Zn) is re-named from "giraudite" according to the new tetrahedrite group nomenclature of Biagione et al., 2020. The IMA formula presented here has not yet been updated to reflect the observation of Zn>Fe2+ in the type material.
Element Weights:
Element% weight
Se49.058 %
Cu30.370 %
As14.323 %
Zn6.249 %

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

Crystallography of Giraudite-(Zn)Hide

Crystal System:
Isometric
Class (H-M):
43m - Hextetrahedral
Space Group:
I43m
Cell Parameters:
a = 10.578 Å
Unit Cell V:
1,183.62 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Anhedral grains to 400 microns, myrmekitic intergrowths with chameanite.

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 Giraudite-(Zn)Hide

Synonyms of Giraudite-(Zn)Hide

Other Language Names for Giraudite-(Zn)Hide

Relationship of Giraudite-(Zn) to other SpeciesHide

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Giraudite-(Zn) associated with EskeborniteCuFeSe2
1 photo of Giraudite-(Zn) associated with 'Pitchblende'UO2

Related Minerals - Strunz-mindat GroupingHide

2.GB.'Polybasite-Tac'[Ag6Sb2S7][Ag9CuS4]Trig. 3m(32/m) : P3m1
2.GB.Kenoargentotetrahedrite-(Zn)[Ag6]4+(Cu4Zn2)Sb4S12◻Iso. 43m : I43m
2.GB.Argentotetrahedrite-(Hg)Ag6(Cu4Hg2)Sb4S12SIso. 43m : I43m
2.GB.Annivite-(Zn)Cu6(Cu4Zn2)Bi4S12SIso. 43m : I43m
2.GB.Pošepnýite(Cu+3◻3)(Hg2+4Cu+2)Sb4Se12(Se0.5◻0.5)Iso. 43m : I43m
2.GB.Tennantite-(Cu)Cu6(Cu4Cu2)As4S12SIso. 43m : I43m
2.GB.Argentopolybasite[Ag6Sb2S7][Ag9AgS4]Trig. 32 : P321
2.GB.Tennantite-(Mn)Cu6(Cu4Mn2)As4S12SIso. 43m : I43m
2.GB.Argentotetrahedrite-(Cd)Ag6(Cu4Cd2)Sb4S12SIso. 43m : I43m
2.GB.Stibioústalečite(Cu4Cu2)(Cu4Cu+2)(Sb2Te2)Se12SeIso. 43m : I43m
2.GB.Stibiogoldfieldite(Cu4Cu2)(Cu4Cu+2)(Sb2Te2)S12SIso. 43m : I43m
2.GB.Argentotetrahedrite-(Zn)Ag6(Cu4Zn2)Sb4S12SIso. 43m : I43m
2.GB.Tetrahedrite-(Cd)Cu6(Cu4Cd2)Sb4S12SIso. 43m : I43m
2.GB.Arsenogoldfieldite(Cu4Cu2)(Cu4Cu+2)(As2Te2)S12SIso. 43m : I43m
2.GB.Arsenoústalečite(Cu4Cu2)(Cu4Cu+2)(As2Te2)Se12SeIso. 43m : I43m
2.GB.Tennantite-(In)Cu6(Cu5In)As4S13Iso. 43m : I43m
2.GB.Zvěstovite-(Fe)Ag6(Ag4Fe2+2)As4S12SIso. 43m : I43m
2.GB.Hakite-(Fe)Cu6(Cu4Fe2+2)Sb4Se12SeIso. 43m : I43m
2.GB.Tennantite-(Cd)Cu6(Cu4Cd2)As4S12SIso. 43m : I43m
2.GB.XKenorozhdestvenskayaite-(Fe)[Ag6]4+(Ag4Fe2+2)Sb4S12◻Iso. 43m : I43m
2.GB.Tetrahedrite-(Cu)Cu6(Cu4Cu2+2)Sb4S12SIso. 43m : I43m
2.GB.Hakite-(Zn)Cu6(Cu4Zn2)Sb4Se12SeIso. 43m : I43m
2.GB.Zvěstovite-(Zn)Ag6(Ag4Zn2)As4S12SIso.
2.GB.Hakite-(Cd)Cu6(Cu4Cd2)Sb4Se12SeIso. 43m : I43m
2.GB.Kenoargentotennantite-(Fe)[Ag6]4+(Cu4Fe2)As4S12◻Iso. 43m : I43m
2.GB.Tennantite-(Hg)Cu6(Cu4Hg2)As4S12SIso. 43m : I43m
2.GB.Tetrahedrite-(Mn)Cu6(Cu4Mn2)Sb4S12SIso. 43m : I43m
2.GB.Tennantite-(Ni)Cu6(Cu4Ni2)As4S12SIso. 43m : I43m
2.GB.Tetrahedrite-(Ni)Cu6(Cu4Ni2)Sb4S12SIso. 43m : I43m
2.GB.05Hakite-(Hg)Cu6(Cu4Hg2)Sb4Se12SeIso. 43m : I43m
2.GB.05Rozhdestvenskayaite-(Zn)Ag6(Ag4Zn2)Sb4S12SIso. 43m : I43m
2.GB.05Argentotennantite-(Zn)Ag6(Cu4Zn2)As4S12SIso. 43m : I43m
2.GB.05Argentotennantite-(Fe)Ag6(Cu4Fe2)As4S12SIso. 43m : I43m
2.GB.05Freibergite Subgroup(Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1Iso. 43m : I43m
2.GB.05Tennantite SubgroupCu6(Cu4C2+2)As4S12SIso. 43m : I43m
2.GB.05Tennantite-(Zn)Cu6(Cu4Zn2)As4S12SIso. 43m : I43m
2.GB.05Tetrahedrite-(Zn)Cu6(Cu4Zn2)Sb4S12SIso. 43m : F43m
2.GB.05Tetrahedrite SubgroupCu6(Cu4C2+2)Sb4S12SIso. 43m : I43m
2.GB.05Tennantite-(Fe)Cu6(Cu4Fe2+2)As4S12SIso. 43m : I43m
2.GB.05Tetrahedrite-(Fe)Cu6(Cu4Fe2+2)Sb4S12SIso. 43m : I43m
2.GB.05Tetrahedrite-(Hg)Cu6(Cu4Hg2)Sb4S12SIso. 43m : I43m
2.GB.05Kenoargentotetrahedrite-(Fe)[Ag6]4+(Cu4Fe2+2)Sb4S12◻Iso. 43m : I43m
2.GB.05Argentotetrahedrite-(Fe)Ag6(Cu4Fe2)Sb4S12SIso. 43m : I43m
2.GB.05Goldfieldite(Cu4◻2)(Cu4Cu+2)Te4S12SIso. 43m : I43m
2.GB.05'UM1992-21-S:AgFeSb'Ag6(Ag4Fe2+2)Sb4S12SIso.
2.GB.10SelenostephaniteAg5SbSe4Orth. 222 : P212121
2.GB.10StephaniteAg5SbS4Orth. mm2 : Cmc21
2.GB.15'UM2003-14-S:AgBiFeTe'Ag16FeBiTe3S8
2.GB.15'UM1979-17-S:BiCuFe'~Cu18Fe4BiS16
2.GB.15Pearceite[Ag6As2S7][Ag9CuS4]Trig. 3m(32/m) : P3m1
2.GB.15ArgentopearceiteAg16As2S11Trig. 32 : P321
2.GB.15Cupropolybasite[Cu6Sb2S7][Ag9CuS4]Trig. 3m : P31m
2.GB.15Fengruiite[Ag6Sb2S7][Ag9CuS2Te2]Trig. 3m(32/m) : P3m1
2.GB.15Auropearceite [Ag9AuS4][Ag6As2S7]Trig. 32 : P321
2.GB.15Selenopolybasite[(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2]Trig. 3m(32/m) : P3m1
2.GB.15Polybasite[Ag6Sb2S7][Ag9CuS4]Mon. 2/m : B2/m
2.GB.15Auropolybasite[Ag9AuS4][Ag6Sb2S7]Trig. 32 : P321
2.GB.15Cupropearceite[Cu6As2S7][Ag9CuS4]Trig. 3m(32/m) : P3m1
2.GB.20Vorontsovite(Hg5Cu)Σ6TlAs4S12Iso. 43m : I43m
2.GB.20Ferrovorontsovite(Fe5Cu)Σ6TlAs4S12Iso. 43m : I43m
2.GB.20Galkhaite(Hg5Cu)CsAs4S12Iso. 43m : I43m

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 Giraudite-(Zn)Hide

References for Giraudite-(Zn)Hide

Localities for Giraudite-(Zn)Hide

Showing 10 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.
Czech Republic
 
  • Central Bohemian Region
Škácha et al. (2017)
      • Háje
Škácha et al. (2017)
  • Plzeň Region
    • Klatovy District
      • Nalžovské Hory
        • Ústaleč
Sejkora et al. (2022)
  • South Bohemian Region
    • Písek District
      • Kovářov
        • Předbořice
Bindi et al. (2016)
France (TL)
 
  • Auvergne-Rhône-Alpes
    • Puy-de-Dôme
      • Issoire
        • Le Vernet-Chaméane
Johan et al. (1982) +1 other reference
Germany
 
  • Saxony
    • Erzgebirgskreis
      • Aue-Bad Schlema
Can Min 40 et al. (2002) +1 other reference
          • Shaft 366
Forster et al. (2004)
Mexico
 
  • Mexico
    • Temascaltepec Municipality
      • Temascaltepec de González (Temascaltepec)
Camprubi
  • Sonora
    • Moctezuma Municipality
Braith et al. (2001)
USA
 
  • Nevada
    • Lyon County
      • Talapoosa Mining District