General Information:
Chemical Formula:
Ni3(CO3)(OH)4·4(H2O)
Composition:
(Molecular Weight = 325.15 gm)
Nickel 54.15 % Ni
Hydrogen 2.79 % H
Carbon 3.69 % C
Oxygen 39.37 % O
Empirical Formula:
Ni3(CO3)(OH)·4(H2O)
Locality:
Cape Ortegal, Galicia, Spain. Broken Hill, New South Wales, Australia.
Name Origin:
Named after Antonio Gil y Zarate (1793-1861), Spanish diplomat, general director of public education, and counselor of state.
Physical Properties:
Cleavage:
None
Color:
emerald green.
Density:
2.6
Diaphaniety:
Translucent
Habits:
Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite)., Encrustations - Forms crust-like aggregates on matrix., Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
3-3.5 - Calcite-Copper Penny
Luminescence:
None.
Luster:
Vitreous - Greasy
Streak:
light green
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