Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
{110} Perfect, {010} Indistinct
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
{010} Perfect, {001} Distinct
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)