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Palladseite

A valid IMA mineral species
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09421190017271925634099.jpg
Palladseite, etc.

Itabira, Minas Gerais, Brazil
05625950017751376847766.jpg
Palladseite, etc.

Cauê mine, Itabira, Minas Gerais, Brazil
09617390017840794487172.jpg
Palladseite

Itabira, Minas Gerais, Brazil
09421190017271925634099.jpg
Palladseite, etc.

Itabira, Minas Gerais, Brazil
05625950017751376847766.jpg
Palladseite, etc.

Cauê mine, Itabira, Minas Gerais, Brazil
03617700017840165674249.jpg
Palladseite

Itabira, Minas Gerais, Brazil
09421190017271925634099.jpg
Palladseite, etc.

Itabira, Minas Gerais, Brazil
05625950017751376847766.jpg
Palladseite, etc.

Cauê mine, Itabira, Minas Gerais, Brazil
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About PalladseiteHide

Formula:
Pd17Se15
Lustre:
Metallic
Hardness:
4½ - 5
Specific Gravity:
8.30
Crystal System:
Isometric
Name:
Named for its chemical composition (Pd and Se).
Chemically related to verbeekite and UM1995-39-Se:Pd.


Unique IdentifiersHide

Mindat ID:
3070
Long-form identifier:
mindat:1:1:3070:6

IMA Classification of PalladseiteHide

Classification of PalladseiteHide

Strunz-mindat (2026):
2.BC.05

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.:
2.16.19.1

2 : SULFIDES
16 : Miscellaneous
Hey's CIM Ref.:
3.12.15

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

Physical Properties of PalladseiteHide

Lustre:
Metallic
Transparency:
Opaque
Hardness:
4½ - 5 on Mohs scale
Hardness:
VHN100=390 - 437 kg/mm2 - Vickers
Density:
8.30 g/cm3 (Measured)    8.33 g/cm3 (Calculated)

Optical Data of PalladseiteHide

Reflectivity:
WavelengthR1 (%)
400nm42.4%
420nm42.8%
440nm43.3%
460nm43.8%
480nm44.3%
500nm44.8%
520nm45.4%
540nm45.7%
560nm45.8%
580nm45.7%
600nm45.6%
620nm45.6%
640nm45.6%
660nm45.7%
680nm45.8%
700nm46.2%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 46.2%.
Colour in reflected light:
white in air and in plane polarized light, and a very light grey in oil

Chemistry of PalladseiteHide

Mindat Formula:
Pd17Se15
Element Weights:
Element% weight
Pd60.435 %
Se39.565 %

Calculated from ideal end-member formula.
Elements listed:
Pd, Se - search for minerals with similar chemistry
Common Impurities:
Cu,Hg

Crystallography of PalladseiteHide

Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Cell Parameters:
a = 10.606 Å
Unit Cell V:
1,193.04 ų (Calculated from Unit Cell)
Z:
2
Comment:
On synthetic material - Pm3m

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009273PalladseiteGeller S (1962) The crystal structure of Pd17Se15 Acta Crystallographica 15 713-7211962synthetic0293
0009272PalladseiteGeller S (1962) The crystal structure of Pd17Se15 Acta Crystallographica 15 713-7211962synthetic0293
0009271PalladseiteGeller S (1962) The crystal structure of Pd17Se15 Acta Crystallographica 15 713-7211962synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
1.887 Å(vvs)
2.832 Å(vs)
2.571 Å(s)
2.430 Å(s)
2.040 Å(s)
1.723 Å(s)

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 PalladseiteHide

Type Locality:
ⓘ Itabira, Minas Gerais, Brazil
General Appearance of Type Material:
Grains up to 0.5mm
Place of Conservation of Type Material:
The Natural History Museum, London, England, 1977,500 and 1934,72.
National Museum of Natural History, Washington, D.C., USA, 142504.
Geological Setting of Type Material:
Placer deposit
Associated Minerals at Type Locality:
ArsenopalladiniteAtheneiteIsomertieite
Reference:
Davis, R. J., Clark, A. M., Criddle, A. J. (1977) Palladseïte, a new mineral from Itabira, Minas Gerais, Brazil. Mineralogical Magazine, 41 (317) 123 doi:10.1180/minmag.1977.041.317.18

Synonyms of PalladseiteHide

Other Language Names for PalladseiteHide

Common AssociatesHide

Associations Based on Photo Data:
2 photos of Palladseite associated with Native GoldAu
1 photo of Palladseite associated with PalladinitePdO
1 photo of Palladseite associated with 'Chrommagnetite'Fe2+(Fe3+,Cr3+)2O4

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.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.35LuberoitePt5Se4Mon. 2/m : P21/b
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 PalladseiteHide

References for PalladseiteHide

Localities for PalladseiteHide

Showing 7 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
 
  • Northern Territory
    • West Arnhem Region
      • South Alligator River
Bloom et al. (1992) +2 other references
Brazil (TL)
 
  • Minas Gerais
M10-13. +1 other reference
MinMag 66:327 +2 other references
  • Pará
    • Curionópolis
Moroni et al. (2001) +5 other references
DR Congo
 
  • Lualaba
    • Mutshatsha
      • Kolwezi
Canadian Mineralogist 46 (2008) +1 other reference
Finland
 
  • Lapland
    • Enontekiö
33rd International Geological Congress (2008) +1 other reference
Morocco
 
  • Drâa-Tafilalet Region
    • Zagora Province
      • Zagora Cercle
        • Tinzouline Caïdat
          • Bleida Mines
El Ghorfi et al. (2006) +1 other reference
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