General Information:
Chemical Formula:(Ca,Mn,Fe)3Al2BO3Si4O12(OH)
Composition:(Molecular Weight = 631.26 gm)Calcium 11.43 %
CaManganese 7.83 %
MnAluminum 8.55 %
AlIron 2.65 %
FeSilicon 17.80 %
SiBoron 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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