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Formula: Ca2(SiAl2)O6(OH)2
Tectosilicate (framework silicate), tetragonal paramorph of isometric
bicchulite
Crystal System: Tetragonal
Specific gravity: 2.82 calculated
Colour: Colourless
Common impurities: Fe,Mg,H2O
Environments
Metamorphic environments
Hydrothermal environments
Localities
At the type locality, the Kamaishi mine, Kamaishi City, Iwate Prefecture, Japan, kamaishilite occurs as grains
about 0.1 mm across in vesuvianite
skarn, associated with
vesuvianite, "hydrograndite" (a discredited member of the
garnet group), and small amounts of
perovskite, calcite,
magnetite and chalcopyrite.
It is apparently an alteration product of vesuvianite
(AM 67.855).
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