Kanonaite

General Information:
 Chemical Formula:
(Mn+++,Al)AlSiO5
 Composition:
(Molecular Weight = 183.01 gm)
Manganese 22.51 % Mn
Aluminum 18.43 % Al
Silicon 15.35 % Si
Oxygen 43.71 % O 
 Empirical Formula:
Mn3+0.75Al1.25SiO5
 IMA Status:
Approved IMA 1978
Physical Properties:
 Cleavage:
[110] Indistinct
 Color:
greenish black.
 Density:
3.395
 Diaphaniety:
Transparent to Subopaque
 Hardness:
6.5 - Pyrite
 Luster:
Vitreous (Glassy)
 Streak:
gray green
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