Stenonite

minerals

cryolite

weberite

jarlite

Formula: Sr2Al(CO3)F5
Compound halide
Specific gravity: 3.86
Hardness: 3½
Streak: White
Colour: Colourless, white
Environments

Pegmatites

Localities

At the type locality, the Ivigtut mine, Arsuk Fjord, Sermersooq, Greenland, stenonite occurs in small grains or crystals up to 4 x 1 cm, mainly in the contact zone between siderite-cryolite ore and masses rich in fluorite. It is closely associated with jarlite, which may replace it; also associated with siderite, cryolite, fluorite, weberite, jørgensenite, thomsenolite, gearksutite, pachnolite, prosopite, topaz, hydrokenoralstonite, muscovite, baryte, quartz, pyrite, sphalerite, chalcopyrite and galena (AM 48.1178, HOM, Mindat).

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