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Biotite oxidation state

A few years ago it was pointed out to me by Sterling Hendricks that ordinary black mica, biotite, which has an intensely black color, owes this color to the presence of iron in both the ferrous and ferric oxidation state. Black tourmalines also usually contain both ferrous and ferric iron. Another intensely black mineral, with black streak, is ilvaite, with composition Ca(Fe )aFe+++(Si04)20H. [Pg.439]

Raeburn SP, llton ES, Veblen DR (1997a) (Quantitative determination of the oxidation state of iron in biotite using X-ray photoelectron spectroscopy 1. Calibration. Geochim Cosmochim Acta 61 4519-4530... [Pg.347]

See other pages where Biotite oxidation state is mentioned: [Pg.337]    [Pg.43]    [Pg.132]    [Pg.144]    [Pg.562]    [Pg.329]    [Pg.340]    [Pg.145]    [Pg.1031]    [Pg.651]    [Pg.538]    [Pg.436]    [Pg.404]    [Pg.84]    [Pg.404]    [Pg.3]    [Pg.408]    [Pg.340]    [Pg.40]   
See also in sourсe #XX -- [ Pg.337 ]



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Biotite

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