General Information:
Chemical Formula:
(Mg,Ni)11(Fe+++,Cr)3(SO4,CO3)3.5(OH)24·11(H2O)
Composition:
(Molecular Weight = 1,558.37 gm)
Magnesium 14.04 % Mg
Chromium 3.34 % Cr
Iron 7.17 % Fe
Nickel 7.53 % Ni
Hydrogen 3.62 % H
Carbon 1.16 % C
Sulfur 4.12 % S
Oxygen 59.03 % O
Empirical Formula:
Mg9Ni2Fe3+2Cr(SO4)2(CO3)1.5(OH)34·11(H2O)
Environment:
Bleached serpentinite matrix.
IMA Status:
Approved IMA 1980
Locality:
Mount Keith nickel deposit, 400 km nnw of Kalgooolie, WA, Australia.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[0001] Perfect
Color:
white or light pink.
Density:
2.12
Habits:
Flakes - Flat, thin crystals or aggregates., Granular - Generally occurs as anhedral to subhedral crystals in matrix., Rosette - Bundled tabular aggregates resembling rose flower peta ls.
Hardness:
2 - Gypsum
Luster:
Pearly
Streak:
white
More details...