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Naldrettite

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Formula:
Pd2Sb
System:
Orthorhombic
Lustre:
Metallic
Hardness:
4 - 5

Classification of Naldrettite

Approved
Approval Year:
2004
2.AC.25d

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

Physical Properties of Naldrettite

Metallic
Diaphaneity (Transparency):
Opaque
Hardness (Mohs):
4 - 5
Hardness (Vickers):
VHN50=358 - 418 kg/mm2
Tenacity:
Elastic
Fracture:
Irregular/Uneven

Optical Data of Naldrettite

Type:
Anisotropic
Anisotropism:
Deep bright blue, lemon-buff, mauve to pale pink
Bireflectance:
Weak
Colour in reflected light:
Bright creamy white
Pleochroism:
Non-pleochroic

Chemical Properties of Naldrettite

Formula:
Pd2Sb
Elements listed in formula:

Crystallography of Naldrettite

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Cmc21
Cell Parameters:
a = 3.3906 Å, b = 17.5551 Å, c = 6.957 Å
Ratio:
a:b:c = 0.193 : 1 : 0.396
Unit Cell Volume:
V 414.10 ų (Calculated from Unit Cell)
Morphology:
Anhedral grains
X-Ray Powder Diffraction Data:
d-spacingIntensity
2.407(34)
2.303(35)
2.245(100)
2.057(52)
2.001(40)
1.367(35)
1.284(42)
1.212(50)

Type Occurrence of Naldrettite

Relationship of Naldrettite to other Species

2.AC.05aAtheneitePd2As0.75Hg0.25
2.AC.05bVincentitePd3As
2.AC.10cArsenopalladinitePd8(As,Sb)3
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.20bPalarstanidePd5(Sn,As)2
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.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

Other Names for Naldrettite

Name in Other Languages:
Simplified Chinese:一锑二钯矿

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.

References for Naldrettite

Reference List:
Bälz, U. and Schubert, K. (1969) Kristallstruktur von Pd2As(r) und Pd2Sb. Journal of Less-Common Metals: 19: 300-304.

Cabri, L.J., McDonald, A.M., Stanley, C.J., Rudashevsky, N.S., Poirier, G., Durham, B.R., Mungall, J.E. and Rudashevsky, V.N. (2005) Naldrettite, Pd2Sb, a new intermetallic mineral from the Mesamax Northwest deposit, Ungava region, Quebec, Canada. Mineralogical Magazine: 69: 89-97.

Internet Links for Naldrettite

mindat.org URL:
https://www.mindat.org/min-27202.html
Please feel free to link to this page.

Localities for Naldrettite

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.
(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.
Australia
 
  • New South Wales
    • Kennedy Co.
      • Fifield
Johan, Z., Ohnenstetter, M., Slansky, E., Barron, L.M., and Suppel, D. (1989) Platinum mineralization in the Alaskan-type intrusive complexes near Fifield, New South Wales, Australia. part 1. platinum-group minerals in clinopyroxenites of the Kelvin Grove prospect, Owendale intrusion. Mineralogy and Petrology, Volume 40, Issue 4, pp.289-309. Jambor, J.L., Vanko, D.A. (1991) New Mineral Names. American Mineralogist, Volume 76, pages 1414-1440 at p.1438.
Canada
 
  • Ontario
    • Sudbury District
      • Denison Township
Robert C. Smith, II Ph.D. P.G.
    • Thunder Bay District
      • Coldwell complex
Mcdonald, A.M., Cabri, L.J., Stanley, C.J., Good, D.J., Redpath, J., Lane, G., Spratt, J. & Ames, D.E. (2015) Coldwellite, Pd3Ag2S, a new mineral species from the Marathon deposit, Coldwell complex, Ontario, Canada. Canadian Mineralogist 53, 1-13.
  • Québec
    • Nord-du-Québec
      • Nunavik
        • Ungava
Am Min 90:1466-1467; McDonald et al (2005), Canadian Mineralogist: 43: 1735-1744
China
 
  • Sichuan Province
    • Garzê Autonomous Prefecture (Ganzi Autonomous Prefecture)
      • Danba Co.
        • Yangliuping Cu-Ni-PGE ore field
Xiaoqiang Hu, Yunquan Li, and Dequan Shuai (2001): Journal of Mineralogy and Petrology 21(1), 14-18; Xiaoqiang Hu, Yunquan Li, and Dequan Shuai (2001): Journal of Chengdu University of Technology 28(1), 48-52
Greece
 
  • Epirus Department (Ipeiros)
    • Pindos Mtn
      • Pindos ophiolite complex
Argyrios Kapsiotis, Tassos A. Grammatikopoulos, Basilios Tsikouras and Konstantinos Hatzipanagiotou (2010): Platinum-Group Mineral Characterization in Concentrates from High-Grade PGE Al-rich Chromitites of Korydallos Area in the Pindos Ophiolite Complex (NW Greece). Resource Geology 60, 178-191.
USA
 
  • Pennsylvania
    • Chester Co.
      • State Line Chromite District
Smith and Barnes (2011) Pennsylvania Geology v. 41, no. 3/4.
Mineral and/or Locality  
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