General Information:
Chemical Formula:
[ ]Mg7Si8O22(OH)2
Composition:
(Molecular Weight = 780.82 gm)
Magnesium 21.79 % Mg
Silicon 28.78 % Si
Hydrogen 0.26 % H
Oxygen 49.18 % O
Empirical Formula:
Mg7(Si8O22)(OH)2
Environment:
Metamorphic rocks.
IMA Status:
Approved IMA 1978
Locality:
Bodenmais, Germany. Montana, USA.
Name Origin:
From the Latin anthophyllum - "clove" in allusion to the color.
Physical Properties:
Cleavage:
[110] Perfect, [???] Distinct, [???] Distinct
Color:
white, greenish gray, green, clove brown, or brownish green.
Density:
2.85 - 3.57, Average = 3.21
Diaphaniety:
Transparent to translucent
Habits:
Fibrous - Crystals made up of fibers., Lamellar - Thin laminae producing a lamellar structure., Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
5-6 - Between Apatite and Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Pearly
Streak:
gray
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