Strontiodresserite

minerals

montroyalite

weloganite

dawsonite

Formula: SrAl2(CO3)2(OH)4.H2O
Hydrated carbonate containing hydroxyl, dresserite group
Specific gravity: 2.71
Hardness: 2 to 3
Streak: White
Colour: White
Environments

Igneous environments
Carbonatites
Sedimentary environments
Metamorphic environments

Localities

At the type locality, the Francon quarry, Montréal, Quebec, Canada, strontiodresserite occurs in vugs in a silicocarbonatite sill as spherical aggregates to 1 mm in diameter of white fibres. Associated minerals include quartz, weloganite, dawsonite, montroyalite and albite (Minrec 37.1.46, Webmin, HOM).

At Condorcet, Nyons, Drôme, Auvergne-Rhône-Alpes, France, strontiodresserite has been found in fissures in marl as compact spherical aggregates, less than 2 mm in diameter, of white fibrous crystals (Minrec 37.1.46).

At the Norcem Quarry, Kjøpsvik, Narvik, Nordland, Norway, strontiodresserite has been found in the marble quarry as white, fibrous masses of capillary crystals up to 2 cm long (Minrec 37.1.46).

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