General Information:
Chemical Formula:
(Ca,Mn,Fe)3Al2BO3Si4O12(OH)
Composition:
(Molecular Weight = 631.26 gm)
Calcium 11.43 % Ca
Manganese 7.83 % Mn
Aluminum 8.55 % Al
Iron 2.65 % Fe
Silicon 17.80 % Si
Boron 3.42 % B
Hydrogen 0.16 % H
Oxygen 48.16 % O
Empirical Formula:
Ca1.8Mn2+0.9Fe2+0.3Al2(BO3)Si4(O)12(OH)
Environment:
Quartz veins in manganese deposits.
Locality:
Tinzen, Val d'Err, Grisons, Switzerland
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
[???] Good, [???] Good
Color:
yellow or orange red.
Density:
3.29
Diaphaniety:
Translucent to subtranslucent
Habits:
Columnar - Forms columns, ,
Hardness:
6.5-7 - Pyrite-Quartz
Luster:
Vitreous (Glassy)
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