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Ca2FeAl2BSi4O15(OH)
Triclinic
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| Figure 16-6. Crystal drawings of ferroaxinite from the Gooseberry Mine in Franklin. These drawings, projections of the same crystal, are from Palache (1935) who provided crystallographic data. | ||
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Ferroaxinite, a calcium iron aluminum boron silicate hydroxide mineral of the axinite group, is rare at Franklin. Palache (1935) reported it as crystals (Figure 16-6) from the Gooseberry Mine, one of a string of magnetite deposits just south of the Franklin Mine; this material has not been restudied.
At the Franklin mine, ferroaxinite is found in the Palmer Shaft area as euhedral, light-brown to medium brown crystals associated with hedenbergite, epidote, end-member zircon, andradite, pyrite, and fluorapophyllite. Partial microprobe analysis of these crystals confirms they are ferroaxinite, with 4 wt. % MnO, 1 wt. % MgO, and no appreciable zinc.
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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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