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Tetra-auricupride

A valid IMA mineral species
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About Tetra-auricuprideHide

Formula:
AuCu
Colour:
golden yellow
Lustre:
Metallic
Hardness:
Specific Gravity:
14.67 (Calculated)
Crystal System:
Tetragonal
Name:
The name is derived from the tetragonal crystal system and compositional similarity to auricupride.
Compare, e.g.: auricupride and its dimorph bogdanovite; UM2001-05-E:AuCu, and UM2001-04-E:AgAuCu.


Unique IdentifiersHide

Mindat ID:
3920
Long-form identifier:
mindat:1:1:3920:4
GUID
(UUID V4):
e8b2a8f0-f5fa-4a82-b96d-402224a9ac13

Classification of Tetra-auricuprideHide

Approved
Approval year:
1982
First published:
1982
1.AA.10b

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
A : Copper-cupalite family
Dana 7th ed.:
1.1.2.2
1.1.2.2

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1.7

1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)

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

Metallic
Transparency:
Opaque
Colour:
golden yellow
Hardness:
4½ on Mohs scale
Hardness:
VHN20=294 kg/mm2 - Vickers
Tenacity:
Malleable
Density:
14.67 g/cm3 (Calculated)

Optical Data of Tetra-auricuprideHide

Anisotropism:
Weak, with colors from gray to light gray
Reflectivity:
WavelengthR
405nm44.6%
436nm46.8%
480nm50.3%
526nm55.8%
546nm61.2%
578nm74.4%
589nm76.6%
622nm83.6%
644nm84.9%
656nm85.4%
664nm86.6%
700nm91.3%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 91.3%.
Colour in reflected light:
Copper-red with a yellow tint

Chemical Properties of Tetra-auricuprideHide

Formula:
AuCu
IMA Formula:
CuAu

Crystallography of Tetra-auricuprideHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P4/mmm
Cell Parameters:
a = 2.800 Å, c = 3.670 Å
Ratio:
a:c = 1 : 1.311
Unit Cell V:
28.77 ų (Calculated from Unit Cell)
Z:
2
Comment:
Space Group: C4/mmm.?

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.24 Å(100)
1.195 Å(100)
0.797 Å(90b)
0.877 Å(70b)
1.125 Å(60b)
0.832 Å(60)
1.99 Å(50)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 3a: Earth’s earliest Hadean crust>4.50
7 : Ultramafic igneous rocks
Near-surface Processes
26 : Hadean detrital minerals
Stage 4b: Highly evolved igneous rocks>3.0
36 : Carbonatites, kimberlites, and related igneous rocks
37 : Layered igneous intrusions and related PGE minerals

Type Occurrence of Tetra-auricuprideHide

Place of Conservation of Type Material:
Geological Museum, Ministry of Geology, Beijing, China
Reference:
Chen Keqiao, Yu Tinggao, Zhang Yongge, and Peng Zhizhong (1982): Tetra-auricupride, CuAu, discovered in China. Scientia Geologica Sinica: 1982(1): 111-116.

Synonyms of Tetra-auricuprideHide

Other Language Names for Tetra-auricuprideHide

Varieties of Tetra-auricuprideHide

Common AssociatesHide

ApatiteCa5(PO4)3(Cl/F/OH)
ChalcopyriteCuFeS2
Chlorite GroupA group of mostly monoclinic (also triclinic or orthorhombic) micaceous phyllosilicate minerals with a structure ...
ChromiteFe2+Cr3+2O4
DiopsideCaMgSi2O6
Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
GoldAu
MagnetiteFe2+Fe3+2O4
PyriteFeS2
PyrrhotiteFe1-xS
Serpentine SubgroupD3[Si2O5](OH)4
SilverAg
Tremolite◻Ca2Mg5(Si8O22)(OH)2
ZirconZr(SiO4)
Associated Minerals Based on Photo Data:
4 photos of Tetra-auricupride associated with GoldAu
1 photo of Tetra-auricupride associated with UrvantsevitePd(Bi,Pb)2
1 photo of Tetra-auricupride associated with TetraferroplatinumPtFe
1 photo of Tetra-auricupride associated with DieneriteNi3As
1 photo of Tetra-auricupride associated with SobolevskitePdBi
1 photo of Tetra-auricupride associated with Stannopalladinite(Pd,Cu)3Sn2
1 photo of Tetra-auricupride associated with SperrylitePtAs2

Related Minerals - Strunz-mindat GroupingHide

1.AA.05AluminiumAlIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05CopperCuIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05GoldAuIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05LeadPbIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05NickelNiIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05SilverAgIso. m3m (4/m 3 2/m) : Fm3m
1.AA.05UM2004-08-E:AuCuPdCu2PdAu
1.AA.05UM1991-06-E:AuCuAu3Cu
1.AA.05SteinhardtiteAl0.38Ni0.32Fe0.30Iso. m3m (4/m 3 2/m) : Im3m
1.AA.10aAuricuprideCu3AuIso. m3m (4/m 3 2/m) : Pm3m
1.AA.10aCuproaurideCu3Au
1.AA.15AnyuiiteAuPb2Tet. 4/mmm (4/m 2/m 2/m) : I4/mcm
1.AA.15Khatyrkite(Cu,Zn)Al2Tet. 4/mmm (4/m 2/m 2/m) : I4/mcm
1.AA.15IodineI2
1.AA.15NovodnepriteAuPb3Tet. 4 2m : I4 2m
1.AA.15UM1985-02-E:AlZn(Zn,Cu)Al2
1.AA.20Cupalite(Cu,Zn)AlOrth.
1.AA.25HunchuniteAu2PbIso. m3m (4/m 3 2/m)
1.AA.30StolperiteAlCuIso. m3m (4/m 3 2/m) : Pm3m
1.AA.35HollisteriteAl3FeMon. 2/m : B2/m
1.AA.40IcosahedriteAl63Cu24Fe13Icos. 5 3m : Fm 3 5
1.AA.45Kryachkoite(Al,Cu)6(Fe,Cu)Orth. mm2 : Cmc21
1.AA.50ProxidecagoniteAl34Ni9Fe2Orth. 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 Tetra-auricuprideHide

References for Tetra-auricuprideHide

Reference List:

Localities for Tetra-auricuprideHide

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.
Australia
 
  • Queensland
    • Mareeba Shire
      • Mungana
Austria
 
  • Styria
    • Leoben District
      • Sankt Stefan ob Leoben
        • Mitterberg
Brazil
 
  • Minas Gerais
    • Catas Altas
    • Itabira
Canada
 
  • Ontario
    • Thunder Bay District
      • Coldwell complex
    • Timiskaming District
      • McGarry Township
China (TL)
 
  • Xinjiang
    • Changji Autonomous Prefecture (Sanji Autonomous Prefecture)
      • Manasi Co. (Manas Co.)
        • Manasi (Manas; Marneshi)
France
 
  • Provence-Alpes-CĂŽte d'Azur
    • Bouches-du-RhĂŽne
      • Aix-en-Provence
        • Peyrolles-en-Provence
Georgia
 
  • Racha-Lechkhumi and Kvemo Svaneti
    • Svaneti District
Greece
 
  • Central Macedonia
    • Chalkidiki
      • Aristotelis
  • Thessaly
    • Trikala
      • Meteora
Greenland
 
  • Sermersooq
Morocco
 
  • DrĂąa-Tafilalet Region
    • Zagora Province
      • Zagora Cercle
        • Tinzouline CaĂŻdat
          • Bleida Mines
Pakistan
 
  • Khyber Pakhtunkhwa Province
    • Upper Kohistan District
Philippines
 
  • Visayas
    • Eastern Visayas Region
      • Samar Island
Poland
 
  • Lower Silesian Voivodeship
    • GƂogĂłw County
      • Gmina Jerzmanowa
        • BądzĂłw
    • Lubin County
Russia
 
  • Buryatia
    • Severo-Baykalsky District
      • Dovyren Highlands
  • Chelyabinsk Oblast
      • Karabash ophiolite massif
        • Soimon Valley
  • Kamchatka Krai
    • Ust-Kamchatsky District
  • Khabarovsk Krai
    • Ayan-Maya district
  • Krasnoyarsk Krai
    • Maimecha and Kotui Rivers Basin
    • Taymyrskiy Autonomous Okrug
      • Taimyr Peninsula
        • Putoran Plateau
    • Taymyrsky Dolgano-Nenetsky District
      • Kureika river
    • Western Sayan range
    • Yermakovsky District
  • Republic of Karelia
  • Sverdlovsk Oblast
    • Nizhnii Tagil
    • Yekaterinburg
  • Tuva
    • Tes-Khemsky District
South Africa
 
  • Limpopo
    • Mopani District Municipality
      • Ba-Phalaborwa Local Municipality
        • Phalaborwa
    • Sekhukhune District Municipality
      • Fetakgomo Tubatse Local Municipality
        • Burgersfort
Switzerland
 
  • Fribourg
    • Sarine
      • Grolley
    • See (Lac)
  • Valais
    • Goms
      • Binn
        • Geisspfad area
Tanzania
 
  • Kigoma Region
USA
 
  • Colorado
    • Montrose County
      • Uravan Mining District
        • Paradox Valley
 
Mineral and/or Locality  
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