1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Gelatinises in acids
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Uneven, Gemstones (2009), Brittle
Uneven, Conchoidal, Brittle
1.6 Cleavage
Prismatic {10 1 0}, perfect
Distinct on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2