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Na0.3Fe3+2(Si,Al)4O10(OH)2.nH2O
Monoclinic
Nontronite, a sodium ferric-iron silicate hydroxide hydrate mineral of the clay group, was reported by Frondel (1972) as dull greenish masses from the mud zone at Sterling Hill in 1962. The first verification was by J. L. Rodda of the New Jersey Zinc Company. The writer has obtained an X-ray powder diffraction pattern of nontronite from some yellowish-green clay coatings associated with altered tephroite on Sterling Hill specimens. Nontronite has not been studied further, and it remains a minor mineral. It has not been reported from Franklin.
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| Copyright © 1995 by Pete J. Dunn |
Website
by Herb Yeates
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This
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