Tenacity
-
Brittle
Solubility
-
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
3.355-3.4333.00-3.25
1
7.18
👆🏻
Fracture
Uneven
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
{???} Good, {???} Good
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
-99994
2
10
👆🏻
Chemical Composition
(Ca,Mn2+ ,Fe2+ ) 3Al 2BSi 4O 15(OH)Anthony et al , Handbook of mineralogy (2001)
CaF2