Tetra-auricupride
A valid IMA mineral species
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About Tetra-auricupride
Formula:
AuCu
Colour:
golden yellow
Lustre:
Metallic
Hardness:
4½
Specific Gravity:
14.67 (Calculated)
Crystal System:
Tetragonal
Name:
The name is derived from the tetragonal crystal system and compositional similarity to auricupride.
Unique Identifiers
Mindat ID:
3920
Long-form identifier:
mindat:1:1:3920:4
GUID
(UUID V4):
(UUID V4):
e8b2a8f0-f5fa-4a82-b96d-402224a9ac13
Classification of Tetra-auricupride
Approved
Approval year:
1982
First published:
1982
Type description reference:
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
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 : 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)
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Taur | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Tau | The 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-auricupride
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-auricupride
Anisotropism:
Weak, with colors from gray to light gray
Reflectivity:
Wavelength | R |
---|---|
405nm | 44.6% |
436nm | 46.8% |
480nm | 50.3% |
526nm | 55.8% |
546nm | 61.2% |
578nm | 74.4% |
589nm | 76.6% |
622nm | 83.6% |
644nm | 84.9% |
656nm | 85.4% |
664nm | 86.6% |
700nm | 91.3% |
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-auricupride
Crystallography of Tetra-auricupride
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 Ă
Âł (Calculated from Unit Cell)
Z:
2
Comment:
Space Group: C4/mmm.?
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.24 Ă | (100) |
1.195 Ă | (100) |
0.797 Ă | (90b) |
0.877 Ă | (70b) |
1.125 Ă | (60b) |
0.832 Ă | (60) |
1.99 Ă | (50) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 3a: Earthâs 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-auricupride
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-auricupride
Other Language Names for Tetra-auricupride
German:Tetra-auricuprid
Simplified Chinese:ćæčééçż
Varieties of Tetra-auricupride
Palladium- and Platinum-bearing Tetra-auricupride | Associated with norilskite. |
Palladium-bearing Tetra-auricupride | Associated with norilskite. |
Common Associates
Apatite | Ca5(PO4)3(Cl/F/OH) |
Chalcopyrite | CuFeS2 |
Chlorite Group | A group of mostly monoclinic (also triclinic or orthorhombic) micaceous phyllosilicate minerals with a structure ... |
Chromite | Fe2+Cr3+2O4 |
Diopside | CaMgSi2O6 |
Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Gold | Au |
Magnetite | Fe2+Fe3+2O4 |
Pyrite | FeS2 |
Pyrrhotite | Fe1-xS |
Serpentine Subgroup | D3[Si2O5](OH)4 |
Silver | Ag |
Tremolite | â»Ca2Mg5(Si8O22)(OH)2 |
Zircon | Zr(SiO4) |
Associated Minerals Based on Photo Data:
4 photos of Tetra-auricupride associated with Gold | Au |
1 photo of Tetra-auricupride associated with Urvantsevite | Pd(Bi,Pb)2 |
1 photo of Tetra-auricupride associated with Tetraferroplatinum | PtFe |
1 photo of Tetra-auricupride associated with Dienerite | Ni3As |
1 photo of Tetra-auricupride associated with Sobolevskite | PdBi |
1 photo of Tetra-auricupride associated with Stannopalladinite | (Pd,Cu)3Sn2 |
1 photo of Tetra-auricupride associated with Sperrylite | PtAs2 |
Related Minerals - Strunz-mindat Grouping
1.AA.05 | Aluminium | Al | Iso. m3m (4/m 3 2/m) : Fm3m |
1.AA.05 | Copper | Cu | Iso. m3m (4/m 3 2/m) : Fm3m |
1.AA.05 | Gold | Au | Iso. m3m (4/m 3 2/m) : Fm3m |
1.AA.05 | Lead | Pb | Iso. m3m (4/m 3 2/m) : Fm3m |
1.AA.05 | Nickel | Ni | Iso. m3m (4/m 3 2/m) : Fm3m |
1.AA.05 | Silver | Ag | Iso. m3m (4/m 3 2/m) : Fm3m |
1.AA.05 | UM2004-08-E:AuCuPd | Cu2PdAu | |
1.AA.05 | UM1991-06-E:AuCu | Au3Cu | |
1.AA.05 | Steinhardtite | Al0.38Ni0.32Fe0.30 | Iso. m3m (4/m 3 2/m) : Im3m |
1.AA.10a | Auricupride | Cu3Au | Iso. m3m (4/m 3 2/m) : Pm3m |
1.AA.10a | Cuproauride | Cu3Au | |
1.AA.15 | Anyuiite | AuPb2 | Tet. 4/mmm (4/m 2/m 2/m) : I4/mcm |
1.AA.15 | Khatyrkite | (Cu,Zn)Al2 | Tet. 4/mmm (4/m 2/m 2/m) : I4/mcm |
1.AA.15 | Iodine | I2 | |
1.AA.15 | Novodneprite | AuPb3 | Tet. 4 2m : I4 2m |
1.AA.15 | UM1985-02-E:AlZn | (Zn,Cu)Al2 | |
1.AA.20 | Cupalite | (Cu,Zn)Al | Orth. |
1.AA.25 | Hunchunite | Au2Pb | Iso. m3m (4/m 3 2/m) |
1.AA.30 | Stolperite | AlCu | Iso. m3m (4/m 3 2/m) : Pm3m |
1.AA.35 | Hollisterite | Al3Fe | Mon. 2/m : B2/m |
1.AA.40 | Icosahedrite | Al63Cu24Fe13 | Icos. 5 3m : Fm 3 5 |
1.AA.45 | Kryachkoite | (Al,Cu)6(Fe,Cu) | Orth. mm2 : Cmc21 |
1.AA.50 | Proxidecagonite | Al34Ni9Fe2 | Orth. mmm (2/m 2/m 2/m) : Pnma |
Other Information
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-auricupride
mindat.org URL:
https://www.mindat.org/min-3920.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
References for Tetra-auricupride
Reference List:
Localities for Tetra-auricupride
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
All localities listed without proper references should be considered as questionable.
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Karabash, Chelyabinsk Oblast, Russia