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Formula: CaSn4+(OH)6
Hydroxide, schoenfliesite subgroup
Specific gravity: 3.28
Hardness: 3
Streak: White
Colour: Colourless, pale yellow
Environments
Localities
At the type locality, Wadi Beht, Oulmès Cercle, Khémisset Province, Rabat-Salé-Kénitra Region, Morocco, burtite occurs in a
high grade metamorphic rock composed of more than 75% by volume of garnet in a
tin skarn. Associated minerals include
wickmanite, stokesite,
datolite, pectolite, a member of the
apophyllite group, varlamoffite,
andradite, wollastonite,
malayaite, clinopyroxene and
löllingite
(AM 67.854).
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