General Information:
Chemical Formula:
(Ni,Cu)Al4(NO3,SO4)2(OH)12·14(H2O)
Composition:
(Molecular Weight = 657.25 gm)
Copper 2.42 % Cu
Nickel 6.70 % Ni
Hydrogen 6.13 % H
Sulfur 2.44 % S
Nitrogen 3.20 % N
Oxygen 79.12 % O
Empirical Formula:
Ni0.75Cu0.25(NO3)1.5(SO4)0.5(OH)12·14(H2O)
Environment:
Friable nodules in allophane before rapid dehydration to mbobomkulite.
IMA Status:
Approved IMA 1980
Locality:
Mbobo Mkulu cave, Nelspruit district, South Africa.
Name Origin:
Named as the hydrated version of mbobomkulite.
Physical Properties:
Cleavage:
[001] Perfect
Color:
sky blue.
Habits:
Powdery - Forms a loose, poorly-coherent pulverulent mass., Nodular - Tuberose forms having irregular protuberances over the surface.,
Streak:
light blue
More details...