Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.98-3.102.9-3.5
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
{100} Perfect, {110} Good, {011} Distinct
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
5.5-65.5-6
2
10
👆🏻
Chemical Composition
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)