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Giraudite

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About GirauditeHide

Formula:
Cu6[Cu4(Fe,Zn)2]As4Se13
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
5.75 (Calculated)
Crystal System:
Isometric
Name:
For Roger Giraud (1936– ), electron microprobe laboratory, BRGM-CNRS, Orleans, France.

Classification of GirauditeHide

Approved
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
3.3.6.5

3 : SULFOSALTS
3 : 3 <ø < 4
5.1.11

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

Physical Properties of GirauditeHide

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

Chemical Properties of GirauditeHide

Formula:
Cu6[Cu4(Fe,Zn)2]As4Se13
Idealised Formula:
(Cu,Zn,Ag)12(As,Sb)4(Se,S)13
Common Impurities:
Hg,Fe

Crystallography of GirauditeHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
I4 3m
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.

Type Occurrence of GirauditeHide

Place of Conservation of Type Material:
National School of Mines, Paris, France
Geological Setting of Type Material:
Late stage veins cutting granite.

Synonyms of GirauditeHide

Other Language Names for GirauditeHide

German:Giraudit
Spanish:Giraudita

Relationship of Giraudite to other SpeciesHide

Other Members of this group:
ArgentotennantiteAg6[Cu4(Fe,Zn)2]As4S13Iso. 4 3m : I4 3m
ArgentotetrahedriteAg6Cu4(Fe,Zn)2Sb4S13Iso. 4 3m : I4 3m
FreibergiteAg6[Cu4Fe2]Sb4S13-xIso. 4 3m : I4 3m
GoldfielditeCu10Te4S13Iso. 4 3m : I4 3m
HakiteCu6[Cu4Hg2]Sb4Se13Iso. 4 3m : I4 3m
RozhdestvenskayaiteAg10Zn2Sb4S13Iso. 4 3m : I4 3m
TennantiteCu6[Cu4(Fe,Zn)2]As4S13Iso. 4 3m : I4 3m
TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13Iso. 4 3m : I4 3m
UM1992-21-S:AgFeSb(Ag,Fe,Zn,Hg)12(Sb,As)4S13Iso.

Related Minerals - Nickel-Strunz GroupingHide

2.GB.05ArgentotennantiteAg6[Cu4(Fe,Zn)2]As4S13Iso. 4 3m : I4 3m
2.GB.05FreibergiteAg6[Cu4Fe2]Sb4S13-xIso. 4 3m : I4 3m
2.GB.05GoldfielditeCu10Te4S13Iso. 4 3m : I4 3m
2.GB.05HakiteCu6[Cu4Hg2]Sb4Se13Iso. 4 3m : I4 3m
2.GB.05TennantiteCu6[Cu4(Fe,Zn)2]As4S13Iso. 4 3m : I4 3m
2.GB.05TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13Iso. 4 3m : I4 3m
2.GB.10SelenostephaniteAg5Sb(Se,S)4Orth.
2.GB.10StephaniteAg5SbS4Orth. mm2 : Cmc21
2.GB.15Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]Trig. 3m (3 2/m) : P3m1
2.GB.15Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]Mon. 2/m : B2/m
2.GB.15UM2003-14-S:AgBiFeTeAg16FeBiTe3S8
2.GB.15Selenopolybasite[(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2]Trig. 3m (3 2/m) : P3m1
2.GB.15Cupropearceite[Cu6As2S7][Ag9CuS4]Trig. 3m (3 2/m) : P3m1
2.GB.15Cupropolybasite[Cu6Sb2S7][Ag9CuS4]Trig. 3m : P3 1m
2.GB.15UM1979-17-S:BiCuFe~Cu18Fe4BiS16
2.GB.20Galkhaite(Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12Iso. 4 3m : I4 3m

Related Minerals - Dana Grouping (8th Ed.)Hide

3.3.6.1TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13Iso. 4 3m : I4 3m
3.3.6.2TennantiteCu6[Cu4(Fe,Zn)2]As4S13Iso. 4 3m : I4 3m
3.3.6.3FreibergiteAg6[Cu4Fe2]Sb4S13-xIso. 4 3m : I4 3m
3.3.6.4HakiteCu6[Cu4Hg2]Sb4Se13Iso. 4 3m : I4 3m
3.3.6.6GoldfielditeCu10Te4S13Iso. 4 3m : I4 3m
3.3.6.7ArgentotennantiteAg6[Cu4(Fe,Zn)2]As4S13Iso. 4 3m : I4 3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

5.1.1SinneriteCu6As4S9Tric. 1 : P1
5.1.2TennantiteCu6[Cu4(Fe,Zn)2]As4S13Iso. 4 3m : I4 3m
5.1.4ChalcostibiteCuSbS2Orth. mmm (2/m 2/m 2/m)
5.1.5TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13Iso. 4 3m : I4 3m
5.1.6GoldfielditeCu10Te4S13Iso. 4 3m : I4 3m
5.1.7EmplectiteCuBiS2Orth. mmm (2/m 2/m 2/m) : Pmna
5.1.8CuprobismutiteCu8AgBi13S24Mon. 2/m : B2/m
5.1.9WitticheniteCu3BiS3Orth. 2 2 2 : P21 21 21
5.1.10HodrušiteCu8Bi12S22Mon.
5.1.11PermingeatiteCu3SbSe4Tet.

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 GirauditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Johan, Z., Picot, P., Ruhlmann, F. (1982): Evolution paragénétique de la minéralisation uranifère de Chaméane (Puy-de-Dôme), France: chaméanite, geffroyite et giraudite, trois séléniures nouveaux de Cu, Fe, Ag et As. Tschermaks Mineralogische und Petrographische Mitteilungen 29, 151-167 (in French).
American Mineralogist: 67: 1074-1075.

Internet Links for GirauditeHide

Localities for GirauditeHide

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.
Czech Republic
 
  • Central Bohemia Region
    • Příbram
      • Háje
Škácha, P., Sejkora, J., Plášil, J. (2017) Příbramite, CuSbSe2, the Se-analogue of chalcostibite, a new mineral from Příbram, Czech Republic. European Journal of Mineralogy: 29 (in press); http://forum.amiminerals.it/viewtopic.php?f=5&t=13349 (2017)
France (TL)
 
  • Auvergne-Rhône-Alpes
    • Puy-de-Dôme
      • Sauxillanges
        • Chaméane
Tschermaks Min.Petr.Mitt.(1982) 29, 151-167; Econ Geol (1997) 92:468-484
Germany
 
  • Saxony
    • Erzgebirge
      • Schlema-Hartenstein District
Can Min 40, 4, (2002), 1161-1170
          • Shaft 366
The Canadian Mineralogist, V 42, 2004, pp. 1719-1732.
Mexico
 
  • Mexico
    • Mun. de Temascaltepec
      • Temascaltepec de González (Temascaltepec)
Camprubi, A., Canals, A., Cardellach, E., Prol-Ledesma, R.M., Rivera, R., 2001, The La Guitarra Ag-Au low-sulfidation epithermal deposit, Temascaltepec district, Mexico: vein structure, mineralogy, and sulfide-sulfosalt chemistry. Society of Economic Geologists Special Publication, v. 8, p. 133-158.
  • Sonora
    • Mun. de Moctezuma
Lapis 2001(1), 11-40
USA
 
  • Nevada
    • Lyon Co.
      • Talapoosa District
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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