General Information:
Chemical Formula:NiMn++++3O7·3(H2O)
Composition:(Molecular Weight = 389.55 gm)Manganese 42.31 %
MnNickel 15.07 %
NiHydrogen 1.55 %
H Oxygen 41.07 %
O Empirical Formula: NiMn4+3O7·3(H2O)
Environment:Cavities in chalcedony in a laterized dunite.
IMA Status:Approved IMA
Locality:SM7 open pit N of Siberia, Kalgoorlie district, WA, Australia.
Name Origin:Named for Ernest (Ernie) Henry Nickel (1925-), Canadian-Australian mineralogist, Commonwealth Scientific and Industrial Research Organization (CISRO) and International Mineralogical Association (IMA).
Physical Properties: Cleavage:[0001] Perfect
Color:reddish black.
Density:3.84
Diaphaniety:Subtranslucent to Opaque
Habits:Microscopic Crystals - Crystals visible only with microscopes., Platy - Sheet forms (e.g. micas)., Rosette - Bundled tabular aggregates resembling rose flower petals.
Hardness:2 - Gypsum
Luster:Sub Metallic
Streak:yellowish brown
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