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Mg4Si6O15(OH)2.6H2O
Orthorhombic
Sepiolite, a magnesium silicate hydroxide hydrate mineral, was reported from Franklin by Germine (1987) who noted it as a replacement of talc. The studied specimen is manganoan with 2.92 wt. % MnO and less than 0.2 wt. % each of other substituents. The specimen is a mass of talc with 0.5 to 1.0 cm depressions containing leathery masses of sepiolite of light brown color. The texture is fibrous with mats and bundles of such fibers having a layered texture inherited from the precursor talc. An extensive TEM-derived texture-description is given by Germine (1987). It has not been reported from Sterling Hill.
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| Copyright © 1995 by Pete J. Dunn |
Website
by Herb Yeates
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This
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