Bario-orthojoaquinite

cyclosilicate

metamorphic

Formula: Ba4Fe2+2Ti2O2(SiO3)8.H2O
Cyclosilicate (ring silicate), joaquinite group
Specific gravity: 3.96
Hardness: 5 to 5½
Colour: Yellow-brown
Environments:

Metamorphic environments

Bario-orthojoaquinite has been reported only from the type locality, the Dallas Gem mine, San Benito county, California, USA, and from the nearby Victor claim. At the type locality it occurs in a block of highly fractured basalt subjected to high-pressure metamorphism and serpentinisation, associated with joaquinite-(Ce), benitoite, baotite, fresnoite and natrolite (Dana, HOM). The crystals are zoned with a joaquinite core (AM 67.809).

Common impurities: Al,TR,Mn,Ca,Na

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