Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.9-3.52.74-2.76
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
{110} Perfect, {???} Distinct, {???} Distinct
{010} Perfect, {001} Distinct
Mohs Hardness
5.5-63.5-4
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)