1 Physical Properties
1.1 Tenacity
1.2 Solubility
Easily soluble in cold dilute HCl
Gelatinises in acids
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Brittle, Uneven, Brittle, Uneven
Uneven, Conchoidal, Brittle
1.6 Cleavage
Good in two directions parallel to the prism faces {110}
Distinct on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
CaZn(AsO4)(OH)
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2