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Polkanovite
Year of discovery: 1998 (Miass river, Russia)
Locality list:
Rh
12
As
7
[Rh
3+
12
][As
7
]
Class:
Arsenide
Luster: Metallic
Diaphaneity: Opaque
Cleavage: No
Density: 10.2
System: Hexagonal
Group: 6/m, P6
3
/m
Lattice: a=9.3, c=3.6