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Arsenopalladinite

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Formula:
Pd8(As,Sb)3
System:
Triclinic
Colour:
Yellowish, creamy white ...
Lustre:
Metallic
Hardness:
4
Name:
For its chemical composition
This page provides mineralogical data about Arsenopalladinite.

Classification of Arsenopalladinite

Approved
2.AC.10c

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
C : Alloys of metalloids with PGE
2.16.5.1

2 : SULFIDES
16 : Miscellaneous
3.12.29

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
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First Recorded Occurrence of Arsenopalladinite

Place of Conservation of First Recorded Material:
The Natural History Museum, London, England, 1934,72, 1977,258; Royal Ontario Museum, Toronto, Canada, M34726; National Museum of Natural History, Washington, D.C., USA, 142504.
Year of Discovery:
1955
Associated Minerals at First Recorded Locality:

Occurrences of Arsenopalladinite

Geological Setting:
Gold deposits

Physical Properties of Arsenopalladinite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Yellowish, creamy white in reflected light.
Hardness (Mohs):
4
Hardness (Vickers):
VHN100=379 - 449 kg/mm2
Tenacity:
Malleable
Density:
10.40 g/cm3 (Measured)    11.028 g/cm3 (Calculated)

Crystallography of Arsenopalladinite

Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 7.43Å, b = 13.95Å, c = 7.35Å
α = 92.88°, β = 119.5°, γ = 87.85°
Ratio:
a:b:c = 0.533 : 1 : 0.527
Z:
6
Morphology:
Rounded grains to 1.8 mm
X-Ray Powder Diffraction Data:
d-spacingIntensity
2.34 (60)
2.28 (20)
2.19 (20)
2.13 (100)
1.41 (40)
1.24 (30)
1.21 (30)
Comments:
Itabira, Brazil.

Optical Data of Arsenopalladinite

Type:
Anisotropic
Anisotropism:
Strong - red and golden brown to blue-gray - air; khaki-brown to blue gray and bright steel-gray in oil
Reflectivity:
400nmR1=43.9%R2= 44.5%
420nmR1=44.7%R2= 45.8%
440nmR1=45.7%R2= 46.5%
460nmR1=46.8%R2= 47.8%
480nmR1=48.1%R2= 49.4%
500nmR1=49.4%R2= 50.8%
520nmR1=50.8%R2= 52.4%
540nmR1=52.1%R2= 53.9%
560nmR1=53.2%R2= 55.1%
580nmR1=54.4%R2= 56.4%
600nmR1=55.4%R2= 57.3%
620nmR1=56.4%R2= 58.1%
640nmR1=57.0%R2= 58.8%
660nmR1=57.7%R2= 59.2%
680nmR1=58.2%R2= 59.8%
700nmR1=58.8%R2= 60.0%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 60.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White, with yellowish creamy tint

Chemical Properties of Arsenopalladinite

Formula:
Pd8(As,Sb)3
Essential elements:
All elements listed in formula:
Analytical Data:
Itabira, Brazil; by electron microprobe.
Pd (77.56)
Cu (0.02)
As (17.08)
Sb (5.15)
Total (99.81)
Empirical Formula:
Pd8.10(As2.53Sb0.47)
Common Impurities:
Cu

Relationship of Arsenopalladinite to other Species

Other Members of Group:
2.AC.05aAtheneitePd2As0.75Hg0.25
2.AC.05bVincentitePd3As
2.AC.10bMertieite-IIPd8(Sb,As)3
2.AC.10aStillwateritePd8As3
2.AC.15aIsomertieitePd11Sb2As2
2.AC.15bMertieite-IPd11(Sb,As)4
2.AC.15aMiessiitePd11Te2Se2
2.AC.20bPalarstanidePd8(As,Sn)3
2.AC.20aStibiopalladinitePd5Sb2
2.AC.20cMenshikovitePd3Ni2As3
2.AC.25eMajakitePdNiAs
2.AC.25aPalladoarsenidePd2As
2.AC.25fPalladobismutharsenidePd2(As,Bi)
2.AC.25cPalladodymite(Pd,Rh)2As
2.AC.25bRhodarsenide(Rh,Pd)2As
2.AC.25dNaldrettitePd2Sb
2.AC.30UM1999-02-As:NiRh(Rh,Ni)7As4
2.AC.30PolkanoviteRh12As7
2.AC.35aGenkinite(Pt,Pd,Rh)4Sb3
2.AC.35bUngavaitePd4Sb3
2.AC.40PolaritePd(Bi,Pb)
2.AC.45cBorishanskiitePd1+x(As,Pb)2 , x = 0-0.2
2.AC.45aFrooditeα-PdBi2
2.AC.45bIridarsenite(Ir,Ru)As2
3.12.1Seinäjokite(Fe,Ni)(Sb,As)2
3.12.2LauriteRuS2
3.12.3Ruthenarsenite(Ru,Ni)As
3.12.4Anduoite(Ru,Os)As2
3.12.5Ruarsite(Ru,Os)AsS
3.12.6Xingzhongite(Pb,Cu,Fe)(Ir,Pt,Rh)2S4
3.12.7RhodplumsiteRh3Pb2S2
3.12.8Cuprorhodsite(Cu,Fe)Rh2S4
3.12.9KonderiteCu3Pb(Rh,Pt,Ir)8S16
3.12.10Bowieite(Rh,Ir,Pt)2S3
3.12.11CherepanoviteRhAs
3.12.12Hollingworthite(Rh,Pt,Pd)AsS
3.12.13Vysotskite(Pd,Ni)S
3.12.14Vasilite(Pd,Cu)16(S,Te)7
3.12.15PalladseitePd17Se15
3.12.16Oosterboschite(Pd,Cu)7Se5
3.12.17TelluropalladinitePd9Te4
3.12.18TemagamitePd3HgTe3
3.12.19SopcheiteAg4Pd3Te4
3.12.20MicheneritePdBiTe
3.12.21KotulskitePd(Te,Bi)
3.12.22Telargpalite(Pd,Ag)3(Te,Bi)
3.12.23Merenskyite(Pd,Pt)(Te,Bi)2
3.12.24PalladoarsenidePd2As
3.12.25StillwateritePd8As3
3.12.26AtheneitePd2As0.75Hg0.25
3.12.27MajakitePdNiAs
3.12.28PalarstanidePd8(As,Sn)3
3.12.30VincentitePd3As
3.12.31PalladobismutharsenidePd2(As,Bi)
3.12.32StibiopalladinitePd5Sb2
3.12.33Hexatestibiopanickelite(Pd,Ni)(Sb,Te)
3.12.34Sudburyite(Pd,Ni)Sb
3.12.35TestibiopalladitePdTe(Sb,Te)
3.12.36BorovskitePd3SbTe4
3.12.37IsomertieitePd11Sb2As2
3.12.38Mertieite-IPd11(Sb,As)4
3.12.39Mertieite-IIPd8(Sb,As)3
3.12.40SobolevskitePd(Bi,Te)
3.12.41Frooditeα-PdBi2
3.12.42PolaritePd(Bi,Pb)
3.12.43UrvantsevitePd(Bi,Pb)2
3.12.44CooperitePtS
3.12.45Braggite(Pt,Pd,Ni)S
3.12.46Kharaelakhite(Cu,Pt,Pb,Fe,Ni)9S8
3.12.47MalaniteCu(Pt3+,Ir3+)2S4
3.12.48Moncheite(Pt,Pd)(Te,Bi)2
3.12.49MaslovitePtBiTe
3.12.50SperrylitePtAs2
3.12.51PlatarsitePtAsS
3.12.52GeversitePtSb2
3.12.53DaomaniteCuPtAsS2
3.12.54Genkinite(Pt,Pd,Rh)4Sb3
3.12.55StumpflitePt(Sb,Bi)
3.12.56InsizwaitePt(Bi,Sb)2
3.12.57ErlichmaniteOsS2
3.12.58Omeiite(Os,Ru)As2
3.12.59Osarsite(Os,Ru)AsS
3.12.60Kashinite(Ir,Rh)2S3
3.12.61InaglyiteCu3Pb(Ir,Pt)8S16
3.12.62Cuproiridsite(Cu,Fe)Ir2S4
3.12.63Iridarsenite(Ir,Ru)As2
3.12.64Irarsite(Ir,Ru,Rh,Pt)AsS
3.12.65TolovkiteIrSbS

Other Names for Arsenopalladinite

Name in Other Languages:

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.
Industrial Uses:
Palladium ore

References for Arsenopalladinite

Reference List:
American Mineralogist (1974): 59: 1332.

Clark, A.M., Criddle, A.J. and Fejer, E.E. (1974): Palladium arsenide–antimonides from Itabira, Minas Gerais, Brazil. Mineralogical Magazine, 39, 528-543.

American Mineralogist (1979): 64: 658.

Cabri, L.J., Clark, A.M., and Chen, T.T. (1977) Arsenopalladinite from Itabira, Brazil, and from the Stillwater Complex, Montana. Canadian Mineralogist: 15: 70-73.

Mineralogical Magazine (1994): 59: 455-463.

Internet Links for Arsenopalladinite

Localities for Arsenopalladinite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Brazil
 
  • Minas Gerais
    • Iron Quadrangle
Canadian Mineralogist: 15: 70-73; Chem. Index of Minerals (1955) p. 23 and 339; Min.Mag.(1974): 39, 528-543
CanMin 34:547-557
Canada
 
  • Ontario
    • Thunder Bay District
      • Seeley Lake Area
EcoMetrix Reort for Stillwater Canada Inc, Marathon Project (2012) Table 4.1-3
China
 
  • Yunnan Province
    • Dali Autonomous Prefecture
      • Midu Co.
Huanbin Song, Mingqin He, Shangzhong Zhang, and Fenghuang Yi (2008): Chinese Journal of Geochemistry 27, 104-108.
Finland
 
Törnroos Ragnar, Johanson Bo, Kojonen Kari, 1998. Alluvial nuggets of platinum group minerals and alloys from Finnish Lapland. Geological survey of Finland, Special Paper
    • Inari
      • Lemmenjoki
33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Pt-Pd selenides from river placers, northern Finland
    • Portimo complex
Econ Geol (1986) 81:1236-1241
Japan
 
  • Hokkaido
    • Kamikawa Province
The Mineral Species of Japan (5th ed) Matsubara
Norway
 
  • Finnmark
    • Porsanger
Nilsson, L. P. & Larsen, R. B. (1998): Edle mineraler i mafiske og ultramafiske bergarter- en oppsummering av platina-gruppe mineraler (PGM) funnet i Norge i de senere år. Norsk Bergverksmuseum Skrift 14: 40-49
Russia
 
  • Eastern-Siberian Region
    • Taymyrskiy Autonomous Okrug
      • Taimyr Peninsula
        • Putoran Plateau
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Monche-Tundra
          • Monchegorsk
33 IGC excursion No 48, August 15 – 21, 2008
Chashchin, V. V., & Petrov, S. V. (2013). Low-sulfide PGE ore in the Volchetundra gabbro-anorthosite pluton, Kola Peninsula, Russia. Geology of Ore Deposits, 55(5), 357-382.
South Africa
 
  • Limpopo Province
Minerals of South Africa
    • Phalaborwa
      • Loolekop
Nikolay Rudashevsky et al (2001) Efficient Technology of Ore Minerals Investigation of PGE-Bearing Deposits – Case Study in (2001) European Union of Geosciences Conference XI (OS6)
USA
 
  • Montana
    • Stillwater Co.
      • Nye
Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
Canadian Mineralogist (1977): 15: 70-73.; Canadian Mineralogist Vol.24, pp. 329-346 (1986)
        • J-M Reef (Howland Reef)
www.cannonmicroprobe.com/Mineral_Specimens.htm
  • Pennsylvania
    • Chester Co.
      • State Line Chromite District
Smith, II, R. C. and Barnes, J. H. (2011)
Mineral and/or Locality  
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