Anhydrous sulphate containing halogen
Specific gravity: 2.616
Solubility: Slowly soluble in water
Schairerite occurs in continental evaporite deposits
At the Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Quebec, Canada, the schairerite occurrence is associated with an intrusive alkalic gabbro-syenite complex. Associated minerals include pectolite, shortite, kogarkoite, phlogopite, arfvedsonite, leucophanite and leucosphenite (HOM).
The type locality, Searles Lake, San Bernardino county, California, USA, is a playa lake deposit. Schairerite was found in a drill core in a lower salt bed. Associated minerals include gaylussite, tychite, galeite, thénardite, northupite, trona, hanksite, calcite, pirssonite and hanksite (Dana, HOM). Inclusions within the schairerite crystals consist of tychite, pirssonite (?), and thénardite (?) (AM 16.133-139).
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