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
IMA Classification of Tetra-auricupride
Approved
IMA Formula:
CuAu
Approval year:
1982
First published:
1982
Classification of Tetra-auricupride
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 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.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Taur | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC 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 | R1 (%) |
|---|---|
| 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). Peak reflectance is 91.3%.
Colour in reflected light:
Copper-red with a yellow tint
Chemistry of Tetra-auricupride
Mindat Formula:
AuCu
Element Weights:
| Element | % weight |
|---|---|
| Cu | 24.393 % |
Calculated from ideal end-member formula.
Elements listed:
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 ų (Calculated from Unit Cell)
Z:
2
Comment:
Space Group: C4/mmm.?
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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 Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest 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-auricupride
Place of Conservation of Type Material:
Geological Museum, Ministry of Geology, Beijing, China
Synonyms of Tetra-auricupride
Other Language Names for Tetra-auricupride
Simplified Chinese:四方铜金矿
Varieties of Tetra-auricupride
| Palladium- and Platinum-bearing Tetra-auricupride | Associated with norilskite. |
| Palladium-bearing Tetra-auricupride | Associated with norilskite. |
Common Associates
Associated Minerals Based on Photo Data:
| 4 photos of Tetra-auricupride associated with Native Gold | Au |
| 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)3Sn |
| 1 photo of Tetra-auricupride associated with Sperrylite | PtAs2 |
| 1 photo of Tetra-auricupride associated with Urvantsevite | Pd(Bi,Pb)2 |
Related Minerals - Strunz-mindat Grouping
| 1.AA. | Jonlarsenite | Al4Cu9 |
| 1.AA.05 | Native Lead | Pb |
| 1.AA.05a | Auricupride Subgroup | |
| 1.AA.05 | Native Nickel | Ni |
| 1.AA.05 | Native Silver | Ag |
| 1.AA.05 | UM2004-08-E:AuCuPd | Cu2PdAu |
| 1.AA.05 | UM1991-06-E:AuCu | Au3Cu |
| 1.AA.05 | Native Aluminium | Al |
| 1.AA.05 | Steinhardtite | Al0.38Ni0.32Fe0.30 |
| 1.AA.05 | Native Gold | Au |
| 1.AA.05 | Native Copper | Cu |
| 1.AA.05 | Copper Group | |
| 1.AA.10a | Cuproauride | Cu3Au |
| 1.AA.10a | Auricupride | Cu3Au |
| 1.AA.10 | Nickel Group | |
| 1.AA.15 | Anyuiite | AuPb2 |
| 1.AA.15 | Novodneprite | AuPb3 |
| 1.AA.15 | UM1985-02-E:AlZn | (Zn,Cu)Al2 |
| 1.AA.15 | Khatyrkite | (Cu,Zn)Al2 |
| 1.AA.20 | Cupalite | (Cu,Zn)Al |
| 1.AA.25 | Hunchunite | Au2Pb |
| 1.AA.30 | Stolperite | AlCu |
| 1.AA.35 | Hollisterite | Al3Fe |
| 1.AA.40 | Icosahedrite | Al63Cu24Fe13 |
| 1.AA.45 | Kryachkoite | (Al,Cu)6(Fe,Cu) |
| 1.AA.50 | Proxidecagonite | Al34Ni9Fe2 |
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.
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External Links:
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References for Tetra-auricupride
Reference List:
Bjerkelund, E., Pearson, William B., Selte, Kari, Kjekshus, A., Hagen, G. (1967) Lattice Parameters of the CuAu(I) Phase. Acta Chemica Scandinavica, 21. 2900-2902 doi:10.3891/acta.chem.scand.21-2900
Localities for Tetra-auricupride
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Lehrmann (2012) |
Austria | |
| K. N. Malitch. (2001) |
| Malitch et al. (2002) |
Brazil | |
| Cabral A (2014) |
| Kwitko et al. (2002) |
Canada | |
| McDonald et al. (2015) |
| Knipe et al. (1997) |
China (TL) | |
| Keqiao Chen et al. (1982) |
France | |
| Y. Moëlo : "Compte-rendu de la ... +1 other reference |
Georgia | |
| Kekelia et al. (2017) |
Greece | |
| Tarkian et al. (1992) |
| Bussolesi et al. (2020) |
| Kapsiotis et al. (2010) |
Greenland | |
| Thomassen et al. (2006, February) +1 other reference |
| Rudashevsky et al. (2023) +2 other references | |
Morocco | |
| El Ghorfi et al. (2006) |
Pakistan | |
| Miller et al. (1991) |
Philippines | |
| Oberthür et al. (2017) |
Poland | |
| Jadwiga PIECZONKA et al. (2008) |
| Piestrzyński et al. (2012) | |
| Kucha H. 2007: Mineralogia kruszcowa i ... |
| Chmielewski et al. (2022) |
Russia | |
| Rudashevskiy N.S. et al. (2003) |
| SEM-EDX analysis T. Witzke |
| Murzin et al. (2013) +1 other reference |
| Sandimirova et al. (2014) +1 other reference |
| Shcheka et al. (2004) |
| Yurichev et al. (2017) +1 other reference |
| Dvorani (2016) |
| Spiridonov et al. (2015) |
| - (2016) +1 other reference | |
| Spiridonov et al. (2011) | |
| Kalugin et al. (2021) | |
| Ryabov et al. (2010, October) |
| Tolstyk et al. (1997) +1 other reference |
| Barkov et al. (2019) |
| Grokhovskaya et al. (2005) |
| Mineralogy of Ural. Native elements et al. (in Rus.) |
| - (2014) |
| Palyanova et al. (2018) |
South Africa | |
| Nikolay Rudashevsky et al (2001) |
| Cairncross et al. (1995) |
Switzerland | |
| Stalder et al. (1998) |
| Meisser et al. (2000) |
| Stalder et al. (1998) |
Tanzania | |
| Wilhelmij et al. (2016) |
USA | |
| Eckel et al. (1997) |
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Nizhnetagilskii massif, Nizhnii Tagil, Sverdlovsk Oblast, Russia