General Information:
Chemical Formula:
(Zn,Ni)Al4(VO3)2(OH)12·2(H2O)
Empirical Formula:
Zn0.75Ni0.25Al4(VO3)2(OH)12·2(H2O)
IMA Status:
Approved IMA 1959
Physical Properties:
Cleavage:
[010] Perfect
Color:
bluish green, blue black, or black.
Density:
2.41 - 2.49, Average = 2.45
Hardness:
3-3.5 - Calcite-Copper Penny
Luster:
Vitreous (Glassy)
Streak:
gray
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