Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.762.9-3.5
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
{010} Perfect, {001} Distinct
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
3.5-45.5-6
2
10
👆🏻
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)