Tenacity
Brittle
Brittle
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.253.50-3.60
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Uneven
Cleavage
Octahedral, perfect on {111}, parting on {011}
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
Mohs Hardness
46
2
10
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Chemical Composition
CaF2
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.