Tenacity
Brittle
-
Solubility
Easily soluble in cold dilute HCl
-
Durability
-
-
Specific Gravity
4.122.9-3.5
1
7.18
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Fracture
Uneven
Conchoidal
Cleavage
Good in two directions parallel to the prism faces {110}
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
4-4.55.5-6
2
10
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Chemical Composition
CaZn(AsO4)(OH)
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)