General Information:
Chemical Formula:
Mn++2SiO3·(H2O)
Composition:
(Molecular Weight = 203.98 gm)
Manganese 53.87 % Mn
Silicon 13.77 % Si
Hydrogen 0.99 % H
Oxygen 31.38 % O
Empirical Formula:
Mn2+2SiO3·(H2O)
Environment:
In a vug in manganese ore.
IMA Status:
Approved IMA
Locality:
The N,chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, Republic of South Africa.
Name Origin:
Named for its locality.
Physical Properties:
Cleavage:
[100] Perfect, [010] Perfect
Color:
light brown.
Density:
3.19
Diaphaniety:
Transparent
Habits:
Spherical - Spherical, rounded aggregates., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Acicular - Occurs as needle-like crystals.
Hardness:
5.5 - Knife Blade
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
More details...