General Information:
Chemical Formula:
CaMn++4Si5O14(OH)2·(H2O)
Composition:
(Molecular Weight = 676.28 gm)
Calcium 5.93 % Ca
Manganese 32.49 % Mn
Silicon 20.76 % Si
Hydrogen 0.60 % H
Oxygen 40.22 % O
Empirical Formula:
CaMn2+4Si5O14(OH)2·(H2O)
Locality:
Pennsylvania mine, SW side of San Antonio Valley, 4 miles ENE of Mount Hamilton, Santa Clara Co., California.
Name Origin:
Named after it's locality.
Physical Properties:
Cleavage:
[100] Good, [010] Good
Color:
light pink or reddish orange.
Density:
3.31
Diaphaniety:
Transparent to Translucent
Hardness:
6.5 - Pyrite
Luster:
Vitreous (Glassy)
Streak:
light pink
More details...