General Information:
Chemical Formula:
Ca3Si3O8[(OH)2-4x,(CO3)x]
Composition:
(Molecular Weight = 366.50 gm)
Calcium 32.81 % Ca
Silicon 22.99 % Si
Hydrogen 0.55 % H
Oxygen 43.65 % O
Empirical Formula:
Ca3Si3O8(OH)2
Environment:
High pressure metamorphic mineral found in greywackes and serpentinites.
IMA Status:
Approved IMA 1967
Locality:
TL: Russian River, 5 miles NNW of Colverdale, Mendocino Co., California.
Name Origin:
Named for Leo Rosenhahn (1904-1991), American amateur mineralogist, who found the mineral.
Physical Properties:
Cleavage:
[001] Perfect, [100] Good, [010] Good
Color:
beige white or colorless.
Density:
2.89
Diaphaniety:
Transparent to Translucent
Habits:
Tabular - Form dimensions are thin in one direction., ,
Hardness:
4.5-5
Luminescence:
Fluorescent, Short UV=yellowish green, Long UV=light orangish pink.
Streak:
white
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