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Mn3+O(OH)
Hexagonal
Feitknechtite, a manganese oxide hydroxide mineral, is rare at Franklin. It was first described as part of a mixture called hydrohausmannite by Frondel (1953) and was further discussed by Wadsley (1955b). The X-ray data for hydrohausmannite were shown to be those of a mixture by Berry and Thompson (1962). The status of hydrohausmannite as a mixture was definitively settled by Bricker (1965), who assigned the name feitknechtite to the Mn3+O(OH) component of this mixture.
Local material has not been much studied and is microscopic; there are no accurate analytical data, and little is known of its occurrence. Frondel reported its occurrence in pyrochroite specimens, but gave no details. Additionally, he reported it as a component of brown needle-like crystals lining solution cavities in a matrix of sussexite, calcite, and zincite. It is not known from Sterling Hill. Feitknechtite has not been studied by the writer.
Feitknechtite was named in honor of Dr. Walter Feitknecht, in recognition of his contributions to the study of manganese oxides.
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| Copyright © 1995 by Pete J. Dunn |
Website
by Herb Yeates
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Link
to homepage
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This
page created: January 11, 2001 |
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