Tenacity
-
Brittle
Solubility
-
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
3.76-3.773.00-3.25
1
7.18
👆🏻
Fracture
-
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
{110} Perfect, {110} Perfect
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
5-64
2
10
👆🏻
Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
CaF2