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Naldrettite

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Mesamax Northwest deposit, Ungava, Nunavik, Nord-du-Québec, Québec, Canada
© 2008, JGW




Formula:
Pd
 
2
Sb
System:OrthorhombicHardness:4 - 5
This page provides mineralogical data about Naldrettite.

Classification of Naldrettite

IMA status:Approved 2004
Nickel-Strunz 10th (pending) edition ID: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
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Type Occurrence of Naldrettite

Type Locality:Mesamax Northwest deposit, Ungava, Nunavik, Nord-du-Québec, Québec, Canada

Physical Properties of Naldrettite

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

Crystallography of Naldrettite

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Space Group:Cmc21
Cell Parameters:a = 3.3906Å, b = 17.5551Å, c = 6.957Å
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:
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)

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:
Pd
 
2
Sb
All elements listed in formula:Pd, Sb

Relationship of Naldrettite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.AC.05aAtheneite
Pd
 
2
As
 
0.75
Hg
 
0.25
2.AC.05bVincentite
Pd
 
3
As
2.AC.10cArsenopalladinite
Pd
 
8
(As,Sb)
 
3
2.AC.10bMertieite-II
Pd
 
8
(Sb,As)
 
3
2.AC.10aStillwaterite
Pd
 
8
As
 
3
2.AC.15aIsomertieite
Pd
 
11
Sb
 
2
As
 
2
2.AC.15bMertieite-I
Pd
 
11
(Sb,As)
 
4
2.AC.15aMiessiite
Pd
 
11
Te
 
2
Se
 
2
2.AC.20bPalarstanide
Pd
 
8
(As,Sn)
 
3
2.AC.20aStibiopalladinite
Pd
 
5
Sb
 
2
2.AC.20cMenshikovite
Pd
 
3
Ni
 
2
As
 
3
2.AC.25eMajakite
PdNiAs
2.AC.25aPalladoarsenide
Pd
 
2
As
2.AC.25fPalladobismutharsenide
Pd
 
2
(As,Bi)
2.AC.25cPalladodymite
(Pd,Rh)
 
2
As
2.AC.25bRhodarsenide
(Rh,Pd)
 
2
As
2.AC.30UM1999-02-As:NiRh
(Rh,Ni)
 
7
As
 
4
2.AC.30Polkanovite
Rh
 
12
As
 
7
2.AC.35aGenkinite
(Pt,Pd,Rh)
 
4
Sb
 
3
2.AC.35bUngavaite
Pd
 
4
Sb
 
3
2.AC.40Polarite
Pd(Bi,Pb)
2.AC.45cBorishanskiite
Pd
 
1+x
(As,Pb)
 
2
 , x = 0-0.2
2.AC.45aFroodite
α-PdBi
 
2
2.AC.45bIridarsenite
(Ir,Ru)As
 
2

Other Names for Naldrettite

Synonyms:
IMA2004-007
Other Languages:

Other Information

Health Warning: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

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    • Localities for Naldrettite

    The 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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    (TL) indicates type locality. ? 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.
    Canada
     
    • Québec
      • Nord-du-Québec
        • Nunavik
          • Ungava
    		Am Min 90:1466-1467; McDonald et al (2005), Canadian Mineralogist: 43: 1735-1744
    Greece
     
    • Epirus (Ipeiros) Department
      • Pindos Mts
        • 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.
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