General Information:
Chemical Formula:
Zn2Mn+++4O8·(H2O)
Composition:
(Molecular Weight = 496.54 gm)
Manganese 44.26 % Mn
Zinc 26.34 % Zn
Hydrogen 0.41 % H
Oxygen 29.00 % O
Empirical Formula:
Zn2Mn3+4O8·(H2O)
Physical Properties:
Cleavage:
[???] Good
Color:
brownish black or dark brown.
Density:
4.64
Diaphaniety:
Opaque
Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Botryoidal - "Grape-like" rounded forms (e.g.. malachite)., Massive - Uniformly indistinguisha ble crystals forming large masses.
Hardness:
5-6 - Between Apatite and Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Sub Metallic
Streak:
dark brown
More details...