Orthocuproplatinum
A valid IMA mineral species
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Formula:
Pt3Cu
Colour:
Greyish white
Lustre:
Metallic
Hardness:
4
Specific Gravity:
17.866 (Calculated)
Crystal System:
Orthorhombic
Name:
Named for its chemical composition and for being in the orthorhombic crystal system.
Type Locality:
Unique Identifiers
Mindat ID:
53364
Long-form identifier:
mindat:1:1:53364:7
GUID
(UUID V4):
(UUID V4):
3030985c-065d-4e55-8e4c-cc298b8bb1a9
Classification of Orthocuproplatinum
Approved
Approval year:
2019
First published:
2019
1.AH.
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
H : Miscellaneous Elements, alloys
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
H : Miscellaneous Elements, alloys
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Ocpt | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Orthocuproplatinum
Metallic
Transparency:
Opaque
Colour:
Greyish white
Hardness:
4 on Mohs scale
Hardness:
VHN100= 243 - Vickers
Tenacity:
Malleable
Cleavage:
None Observed
Parting:
None observed
Fracture:
None observed
Density:
17.866 g/cm3 (Calculated)
Optical Data of Orthocuproplatinum
Anisotropism:
Slightly perceptible, nearly isotropic
Bireflectance:
Not visible
Reflectivity:
Wavelength | R |
---|---|
400nm | 53.0% |
420nm | 54.5% |
440nm | 56.1% |
460nm | 57.7% |
470nm | 58.4% |
480nm | 59.1% |
500nm | 60.5% |
520nm | 61.7% |
540nm | 62.6% |
546nm | 62.9% |
560nm | 63.7% |
580nm | 64.5% |
589nm | 65.0% |
600nm | 65.4% |
620nm | 66.2% |
640nm | 66.9% |
650nm | 67.3% |
660nm | 67.6% |
680nm | 68.1% |
700nm | 68.6% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 68.6%.
Colour in reflected light:
A whitish colour
Internal Reflections:
None observed
Pleochroism:
Not Visible
Chemical Properties of Orthocuproplatinum
Formula:
Pt3Cu
Elements listed:
Crystallography of Orthocuproplatinum
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cmmm
Setting:
Cmmm
Cell Parameters:
a = 7.681(1) Å, b = 5.4318(8) Å, c = 2.7502(4) Å
Ratio:
a:b:c = 1.414 : 1 : 0.506
Unit Cell V:
114.74 ų
Z:
2
Morphology:
Grain.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.337 Å | (11) |
2.236 Å | (100) |
2.217 Å | (97) |
1.932 Å | (61) |
1.920 Å | (30) |
1.362 Å | (36) |
1.169 Å | (24) |
1.161 Å | (23) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
26 : Hadean detrital minerals |
Type Occurrence of Orthocuproplatinum
General Appearance of Type Material:
A 1.5-mm-long alluvial grain with a rim of hongshiite and inclusions of calcite.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collection of “Geosammlung”, Technische Universität Clausthal, Adolph-Roemer-Strasse 2A, D-38678 Clausthal-Zellerfeld, Germany, catalogue number 11331
Empirical Formula of Type Material:
Pt2.76Cu1.24
Chemical Analysis of Type Material:
Cu | 12.9 % |
---|---|
Pt | 87.3 % |
Total: | 100.2 % |
Geological Setting of Type Material:
In a heavy-mineral concentrate.
Associated Minerals at Type Locality:
Reference:
Cabral, A.R., Skála, R., Vymazalová, A., Maixner, J., Stanley, C.J., Lehmann, B., Jedwab, J. (2019): Orthocuproplatinum, Pt3Cu, a new mineral from the Lubero region, North Kivu, Democratic Republic of the Congo. Mineralogy and Petrology: 113: 527-532.
Synonyms of Orthocuproplatinum
Related Minerals - Strunz-mindat Grouping
1.AH. | Decagonite | Al71Ni24Fe5 | Icos. |
1.AH. | Mitrofanovite | Pt3Te4 | Trig. 3m : R3m |
1.AH. | Tomamaeite | Cu3Pt | Iso. m3m (4/m 3 2/m) : Pm3m |
1.AH.10 | Cerium | Ce | |
1.AH.15 | Tantalum | Ta | Iso. |
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.
References for Orthocuproplatinum
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Cabral, A.R., Skála, R., Vymazalová, A., Maixner, J., Stanley, C.J., Lehmann, B. and Jedwab, J. (2019) Orthocuproplatinum, IMA 2018-124. CNMNC Newsletter No. 47, February 2019, page 202. European Journal of Mineralogy, 31: 199–204.
Cabral, A.R., Skála, R., Vymazalová, A., Maixner, J., Stanley, C.J., Lehmann, B., Jedwab, J. (2019): Orthocuproplatinum, Pt3Cu, a new mineral from the Lubero region, North Kivu, Democratic Republic of the Congo. Mineralogy and Petrology: 113: 527-532.
Internet Links for Orthocuproplatinum
mindat.org URL:
https://www.mindat.org/min-53364.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Orthocuproplatinum
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).
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.
DR Congo (TL) | |
| Cabral, A.R., Skála, R., Vymazalová, A., Maixner, J., Stanley, C.J., Lehmann, B. and Jedwab, J. (2019) Orthocuproplatinum, IMA 2018-124. CNMNC Newsletter No. 47, February 2019, page 202; European Journal of Mineralogy, 31: 199–204.; Cabral, A.R., Skála, R., Vymazalová, A., Maixner, J., Stanley, C.J., Lehmann, B., Jedwab, J. (2019): Orthocuproplatinum, Pt3Cu, a new mineral from the Lubero region, North Kivu, Democratic Republic of the Congo. Mineralogy and Petrology, 113, 527-532. |
Japan | |
| NISHIO–HAMANE, D., & Saito, K. (2022). Platinum–group minerals in the placer deposit in northwestern Hokkaido, Japan: description of a new mineral, tomamaeite. Journal of Mineralogical and Petrological Sciences, 117(1), 220309. |
NISHIO–HAMANE, D., & Saito, K. (2022). Platinum–group minerals in the placer deposit in northwestern Hokkaido, Japan: description of a new mineral, tomamaeite. Journal of Mineralogical and Petrological Sciences, 117(1), 220309. | |
| NISHIO–HAMANE, D., & Saito, K. (2022). Platinum–group minerals in the placer deposit in northwestern Hokkaido, Japan: description of a new mineral, tomamaeite. Journal of Mineralogical and Petrological Sciences, 117(1), 220309. |
Russia | |
| Spiridonov, E. M. (2020, September). Metamorphogenic–Hydrothermal Nielsenite, PdCu 3, in Sulfide-Bearing Anorthosites of the Yoko-Dovyren Intrusive in Baikalides of the Northern Baikal Region. In Doklady Earth Sciences (Vol. 494, pp. 704-706). Pleiades Publishing. |