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Palladobismutharsenide

A valid IMA mineral species
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Formula:
Pd2(As,Bi)
Colour:
Silver-white
Lustre:
Metallic
Hardness:
5
Specific Gravity:
10.8 (Calculated)
Crystal System:
Orthorhombic
Name:
Named for the composition.
Compare very similar palladoarsenide and UM1976-01-As:BiPd; also similar: UM1975-07-As:PdSn, UM1974-01-As:PdSb, and UM1976-03-As:NiPd.


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Unique IdentifiersHide

Mindat ID:
3069
Long-form identifier:
mindat:1:1:3069:0

IMA Classification of PalladobismutharsenideHide

Classification of PalladobismutharsenideHide

Strunz-mindat (2026):
2.AC.25f

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
C : Alloys of metalloids with PGE
Dana 8th ed.:
2.4.15.1

2 : SULFIDES
4 : AmBnXp, with (m+n):p = 2:1
Hey's CIM Ref.:
3.12.31

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
12 : Sulphides etc. of the platinum metals

Mineral SymbolsHide

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

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

Physical Properties of PalladobismutharsenideHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Silver-white
Hardness:
5 on Mohs scale
Hardness:
VHN25=429 - 483 kg/mm2 - Vickers
Density:
10.8 g/cm3 (Calculated)

Optical Data of PalladobismutharsenideHide

Anisotropism:
Weak to distinct; in air from gray to extinction, in oil varying from gray to brownish gray or brown at extinction.
Reflectivity:
WavelengthR1 (%)R2 (%)
470nm53.6%54.5%
546nm52.1%53.0%
589nm53.6%54.6%
650nm55.8%56.1%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 56.1%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Pale cream
Pleochroism:
Non-pleochroic

Chemistry of PalladobismutharsenideHide

Mindat Formula:
Pd2(As,Bi)
Element Weights:
Element% weight
Pd73.964 %
As26.036 %

Calculated from ideal end-member formula.
Elements listed:
As, Bi, Pd - search for minerals with similar chemistry

Crystallography of PalladobismutharsenideHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 7.504(4) Å, b = 18.884(1) Å, c = 6.841(7) Å
Ratio:
a:b:c = 0.397 : 1 : 0.362
Unit Cell V:
969.41 ų (Calculated from Unit Cell)
Z:
20
Comment:
Point Group: 2/m 2/m 2/m or mm2.; Space Group: Pmcn or P21cn.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.224 Å(100)
2.505 Å(90)
2.089 Å(60)
2.596 Å(40)
1.880 Å(40)
2.380 Å(30)
1.211 Å(30)

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])
Stage 4b: Highly evolved igneous rocks>3.0
37 : Layered igneous intrusions and related PGE minerals

Type Occurrence of PalladobismutharsenideHide

Co-Type Localities:
ⓘ Stillwater Complex, Montana, USA
ⓘ Stillwater Mine, Stillwater County, Montana, USA
General Appearance of Type Material:
Grains to 165 microns.
Place of Conservation of Type Material:
Royal Ontario Museum, Toronto, M34218.
U.S. National Museum, Smithsonian Institution, Washington, D.C., NMNH #135407.
Crystal Structure Laboratory, CANMET.

Reference:
Cabri, L.J., Chen, T.T., Stewart, J.M., Laflamme, J.H. Gilles (1976) Two new palladium-arsenic-bismuth minerals from the Sillwater Complex, Montana. The Canadian Mineralogist: 14: 410-413.

Synonyms of PalladobismutharsenideHide

Other Language Names for PalladobismutharsenideHide

Simplified Chinese:铋砷钯矿

Related Minerals - Strunz-mindat GroupingHide

2.AC.VadlazarenkovitePd8Bi1.5Te1.25As0.25Trig. 3m (3 2/m) : R3c
2.AC.TörnroositePd11As2Te2Iso. m3m (4/m 3 2/m) : Fd3m
2.AC.05bVincentitePd3AsMon.
2.AC.05aAtheneitePd2As0.75Hg0.25Hex. 6 m2 : P62m
2.AC.10cArsenopalladinitePd8(As,Sb)3Tric. 1 : P1
2.AC.10bMertieitePd8Sb2.5As0.5Trig. 3m (3 2/m) : R3c
2.AC.10aStillwateritePd8As3Trig.
2.AC.15aIsomertieitePd11Sb2As2Iso. m3m (4/m 3 2/m) : Fd3m
2.AC.15aMiessiitePd11Te2Se2Iso. m3m (4/m 3 2/m) : Fd3m
2.AC.15bPseudomertieitePd11(Sb,As)4Hex.
2.AC.20cMenshikovitePd3Ni2As3Hex. 6/m : P63/m
2.AC.20aStibiopalladinitePd5Sb2Hex.
2.AC.20bPalarstanidePd5(Sn,As)2Hex.
2.AC.25cPalladodymite(Pd,Rh)2AsOrth. mmm (2/m 2/m 2/m) : Pnma
2.AC.25dNaldrettitePd2SbOrth. mm2 : Cmc21
2.AC.25bRhodarsenide(Rh,Pd)2AsOrth.
2.AC.25eMajakitePdNiAsHex.
2.AC.25aPalladoarsenidePd2AsMon. 2/m : P2/m
2.AC.30UM1999-02-As:NiRh(Rh,Ni)7As4
2.AC.30PolkanoviteRh12As7Hex. 6/m : P63/m
2.AC.35bUngavaitePd4Sb3Tet. 4 2 2 : P41 21 2
2.AC.35aGenkinitePt4Sb3Tet. 4 2 2
2.AC.40PolaritePd(Bi,Pb)Orth. mm2 : Cmc21
2.AC.45aFrooditeα-PdBi2Mon. 2/m : B2/m
2.AC.50ViteitePd5InAsTet. 4/mmm (4/m 2/m 2/m) : P4/mmm
2.AC.50NipalarsiteNi8Pd3As4Iso. m3m (4/m 3 2/m)

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 PalladobismutharsenideHide

References for PalladobismutharsenideHide

Localities for PalladobismutharsenideHide

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.
Canada
 
  • Ontario
    • Thunder Bay District
Liferovich & Mitchell pers. comm. L. ...
Russia
 
  • Murmansk Oblast
    • Fedorovo-Pansky massif (Pana layered complex)
33rd International Geological Congress (2008)
33rd International Geological Congress (2008)
    • Monche tundra intrusion
Chashchin et al. (2018)
South Africa
 
  • Limpopo
    • Waterberg District Municipality
      • Mogalakwena Local Municipality
        • Mokopane
          • Mogalakwena Mine
Holwell et al. (2006) +1 other reference
USA (TL)
 
  • Montana
Cabri et al. (1976)
    • Stillwater County
Cabri et al. (1976) +1 other reference
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