Orcelite

General Information:
 Chemical Formula:
Ni5-xAs2 (x=0.23)
 Composition:
(Molecular Weight = 429.79 gm)
Nickel 65.14 % Ni
Arsenic 34.86 % As
 Empirical Formula:
Ni4.77As2
 Environment:
Inclusions in pentlandite in ultramafic rocks.
 IMA Status:
Approved IMA 1959
 Locality:
Tiebaghi massif, New Caledonia.
 Name Origin:
Named for Jean Orcel (1896-1978), French mineralogist.
Physical Properties:
 Color:
yellow white or pink bronze.
 Density:
7.5
 Diaphaniety:
Opaque
 Habits:
Microscopic Crystals - Crystals visible only with microscopes., ,
 Luster:
Metallic
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