Tenacity
Brittle
Brittle
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.252.98-3.03
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Uneven
Cleavage
Octahedral, perfect on {111}, parting on {011}
[110] perfect; [010] distinct
Mohs Hardness
45-6
2
10
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Chemical Composition
CaF2
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.