Formula: Fe2+2Si2O6
Inosilicate (chain silicate), clinopyroxene subgroup,
pyroxene group, monoclinic
paramorph of orthorhombic
ferrosilite,
forms a series with clinoenstatite
Crystal System: Monoclinic
Specific gravity: 4.068 calculated
Hardness: 5 to 6
Streak: White
Colour: Brown, colourless, green
Environments
Localities
At Lake Naivasha, Kajiado County, Kenya, clinoferrosilite is found as minute needles in lithophysae (hollow,
bubblelike, or roselike spherulites, usually with a radial and concentric structure, that occur in certain
rhyolites, obsidians and
related rocks (Mindat)) in obsidian, with
anorthoclase, cristobalite,
magnetite, fayalite and
biotite
(AM 21.678).
The type locality is Obsidian Cliff, Park county, Wyoming, USA.
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