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Luberoite

A valid IMA mineral species
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Formula:
Pt5Se4
Colour:
dark bronze
Lustre:
Metallic
Hardness:
5 - 5½
Specific Gravity:
11.76 - 12.78
Crystal System:
Monoclinic
Name:
For the type locality
This page provides mineralogical data about Luberoite.


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Unique IdentifiersHide

Mindat ID:
2448
Long-form identifier:
mindat:1:1:2448:4

Similar NamesHide

LiberiteA valid IMA mineral speciesLi2BeSiO4

IMA Classification of LuberoiteHide

Classification of LuberoiteHide

Strunz-mindat (2026):
2.BC.35

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
C : With Rh, Pd, Pt, etc.
Dana 8th ed.:
2.16.23.1

2 : SULFIDES
16 : Miscellaneous

Mineral SymbolsHide

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

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

Physical Properties of LuberoiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Dark bronze
Hardness:
5 - 5½ on Mohs scale
Hardness:
VHN15=461 kg/mm2 - Vickers
Cleavage:
Very Good
parallel to {ОО1}
Density:
11.76 - 12.78 g/cm3 (Measured)    13.02 g/cm3 (Calculated)
Comment:
Density measured by size of crystal with SEM and weighing

Optical Data of LuberoiteHide

Anisotropism:
Strong
Bireflectance:
very high
Reflectivity:
WavelengthR1 (%)R2 (%)
470nm48.6%42.6%
546nm53.0%46.7%
589nm55.0%48.6%
650nm58.0%51.5%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 58.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
white with а greenish-yellow hue
Internal Reflections:
none
Pleochroism:
Weak
Comments:
low

Chemistry of LuberoiteHide

Mindat Formula:
Pt5Se4
Element Weights:
Element% weight
Pt75.540 %
Se24.460 %

Calculated from ideal end-member formula.
Elements listed:
Pt, Se - search for minerals with similar chemistry

Crystallography of LuberoiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 6.584(5) Å, b = 4.602(3) Å, c = 11.10(1) Å
β = 101.6(1)°
Ratio:
a:b:c = 1.431 : 1 : 2.412
Unit Cell V:
329.46 ų (Calculated from Unit Cell)
Z:
2
Twinning:
polysynthetic
Comment:
Space group from synthetic

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014140LuberoiteMatkovic P, Schubert K (1977) Kristallstruktur von Pt5Se4 Journal of the Less-Common Metals 55 185-1901977synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.45 Å(60)
3.27 Å(60)
2.93 Å(80)
2.78 Å(60)
2.648 Å(60B)
2.465 Å(60
1.875 Å(100B)
1.812 Å(70)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
26 : Hadean detrital minerals
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of LuberoiteHide

Type Locality:
ⓘ Lubero Territory, North Kivu, DR Congo
General Appearance of Type Material:
idiomorphic crystals, sometimes elongated, or as monomineralic fragments.
Place of Conservation of Type Material:
Institut Royal des Sciences Naturelles de Belgique, Brussels (Nr. RC-4215),
Geological Setting of Type Material:
Placers - in granodiorites
Associated Minerals at Type Locality:
Native PlatinumQuartz
Reference:
Jedwab, Jacques, Cervelle, Bernard, Gouet, Geneviève, Hubaut, Xavier, Piret, Paul (1992) The new platinum selenide luberoite Pt5Se4 from the Lubero region (Kivu Province, Zaire) European Journal of Mineralogy, 4 (4) 683-692 doi:10.1127/ejm/4/4/0683

Synonyms of LuberoiteHide

Other Language Names for LuberoiteHide

Dutch:Luberoiet
German:Luberoit
Spanish:Luberoita

Related Minerals - Strunz-mindat GroupingHide

2.BC.PanskyitePd9Ag2Pb2S4Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BC.FleetiteCu2RhIrSb2Iso. m3m(4/m32/m) : Fd3m
2.BC.ColdwellitePd3Ag2SIso. 432 : P4332
2.BC.'UM2004-45-Se:AgHgPd'(Ag,Cu)6Hg2Pd2Se3
2.BC.05'UM2000-47-S:CuFePdPt'PtPd(Fe,Cu)S
2.BC.05MiassiteRh17S15Iso. m3m(4/m32/m) : Pm3n
2.BC.05PalladseitePd17Se15Iso. m3m(4/m32/m)
2.BC.10Oosterboschite(Pd,Cu)7Se5Orth.
2.BC.15ChrisstanleyiteAg2Pd3Se4Mon. 2/m : P21/b
2.BC.15JagüéiteCu2Pd3Se4Mon. 2/m : P21/b
2.BC.20KeithconnitePd20Te7Trig. 3 : R3
2.BC.25Vasilite(Pd,Cu)16(S,Te)7Iso. 43m : I43m
2.BC.30TelluropalladinitePd9Te4Mon. 2/m : P21/b
2.BC.35KojonenitePd7-xSnTe2 (0.3 ≤ x ≤ 0.8)Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BC.37KravtsovitePdAg2SOrth. mmm(2/m2/m2/m) : Cmcm
2.BC.40Oulankaite(Pd,Pt)5(Cu,Fe)4SnTe2S2Tet.
2.BC.40LukkulaisvaaraitePd14Ag2Te9Tet. 4/m : I4/m
2.BC.42MonchetundraitePd2NiTe2Orth. mmm(2/m2/m2/m) : Ibam
2.BC.45Telargpalite(Pd,Ag)3(Te,Bi)Iso.
2.BC.45ThalhammeritePd9Ag2Bi2S4Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.BC.47VymazalováitePd3Bi2S2Iso. 23 : I213
2.BC.50TemagamitePd3HgTe3Trig. 3m : P3m1
2.BC.55BowlesitePtSnSOrth. mm2 : Pca21
2.BC.55SopcheiteAg4Pd3Te4Orth.
2.BC.60LaflammeitePd3Pb2S2Mon. 2/m : B2/m
2.BC.65TischendorfitePd8Hg3Se9Orth.

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 LuberoiteHide

References for LuberoiteHide

Localities for LuberoiteHide

Showing 5 localities.

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.
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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
 
  • Western Australia
    • East Pilbara Shire
      • Rudall River District
Nickel (2002)
DR Congo (TL)
 
  • North Kivu
Jedwab et al. (1992)
Cabral et al. (2014)
Finland
 
  • Lapland
    • Enontekiö
33rd International Geological Congress (2008)
    • Inari
      • Ivalojoki
Kari Kojonen (2012)
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