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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.
Known synthetic analogue. Compare 'Unnamed (Pt-Cu Alloy)'.


Hide all sections | Show all sections

Unique IdentifiersHide

Mindat ID:
53364
Long-form identifier:
mindat:1:1:53364:7
GUID
(UUID V4):
3030985c-065d-4e55-8e4c-cc298b8bb1a9

Classification of OrthocuproplatinumHide

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

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

Physical Properties of OrthocuproplatinumHide

Metallic
Transparency:
Opaque
Colour:
Greyish white
Hardness:
Hardness:
VHN100= 243 - Vickers
Tenacity:
Malleable
Cleavage:
None Observed
Parting:
None observed
Fracture:
None observed
Density:
17.866 g/cm3 (Calculated)

Optical Data of OrthocuproplatinumHide

Anisotropism:
Slightly perceptible, nearly isotropic
Bireflectance:
Not visible
Reflectivity:
WavelengthR
400nm53.0%
420nm54.5%
440nm56.1%
460nm57.7%
470nm58.4%
480nm59.1%
500nm60.5%
520nm61.7%
540nm62.6%
546nm62.9%
560nm63.7%
580nm64.5%
589nm65.0%
600nm65.4%
620nm66.2%
640nm66.9%
650nm67.3%
660nm67.6%
680nm68.1%
700nm68.6%

Reflectance graph
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 OrthocuproplatinumHide

Formula:
Pt3Cu

Crystallography of OrthocuproplatinumHide

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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
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 EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
26 : Hadean detrital minerals

Type Occurrence of OrthocuproplatinumHide

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:
Cu12.9 %
Pt87.3 %
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 OrthocuproplatinumHide

Related Minerals - Strunz-mindat GroupingHide

1.AH.DecagoniteAl71Ni24Fe5Icos.
1.AH.MitrofanovitePt3Te4Trig. 3m : R3m
1.AH.TomamaeiteCu3PtIso. m3m (4/m 3 2/m) : Pm3m
1.AH.10CeriumCe
1.AH.15TantalumTaIso.

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 OrthocuproplatinumHide

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 OrthocuproplatinumHide

Localities for OrthocuproplatinumHide

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.
DR Congo (TL)
 
  • North Kivu
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
 
  • Hokkaidō Prefecture
    • Rumoi Subprefecture
      • Tomamae District
        • Haboro
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.
    • Sorachi Subprefecture
      • Numata
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
 
  • Buryatia
    • Severo-Baykalsky District
      • Dovyren Highlands
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.
 
Mineral and/or Locality  
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