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Formula: (NH4)Cl
Normal halide
Crystal System: Isometric
Specific gravity: 1.532 measured, 1.535 calculated
Hardness: 1 to 2
Streak: White
Colour: Colourless, white, sometimes yellow or brown
Solubility: Soluble in water
Environments
Cave deposits
Fumeroles
Coal-seam fires
Salammoniac is a sublimation product around volcanic fumaroles; in burning coal seams and waste piles; in guano
deposits. The ammonia usually is derived from organic matter. Associated minerals include
sulphur in fumaroles, and realgar,
orpiment, sulphur,
mascagnite and tschermigite in
burning coal seams
(HOM).
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