General Information:
Chemical Formula:
(Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O)
Environment:
Crusts on gypsum crystals.
Locality:
Mbobo Mkulu cave, eastern Transvaal, South Africa.
Name Origin:
Named in allusion to its composition.
Physical Properties:
Cleavage:
[???] Perfect
Color:
sky blue.
Density:
2.24
Habits:
Encrustations - Forms crust-like aggregates on matrix., Nodular - Tuberose forms having irregular protuberances over the surface.,
Hardness:
2.5 - Finger Nail
Streak:
bluish white
More details...