Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.98-3.103.355-3.433
1
7.18
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Fracture
Uneven, Conchoidal
Uneven
Cleavage
{100} Perfect, {110} Good, {011} Distinct
{???} Good, {???} Good
Mohs Hardness
5.5-6-9999
2
10
👆🏻
Chemical Composition
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
(Ca,Mn2+ ,Fe2+ ) 3Al 2BSi 4O 15(OH)Anthony et al , Handbook of mineralogy (2001)