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Tooeleite, a new mineral from the U.S. Mine, Tooele County, Utah

Published online by Cambridge University Press:  05 July 2018

Fabien P. Cesbron
Affiliation:
Globo De Plomo Enterprises, P.O. Box 872, Douglas AZ 85608, U.S.A.
Sidney A. Williams
Affiliation:
Globo De Plomo Enterprises, P.O. Box 872, Douglas AZ 85608, U.S.A.

Abstract

The new mineral tooeleite occurs with pyrite, arsenopyrite, scorodite, and jarosite at the U.S. Mine, Tooele Country, Utah. Analysis by electron microprobe gave Fe2O3 43.56%, As2O5 38.61%, SO3 7.24%, and H2O by the Penfield method 9.80%. For this analysis, the suggested formula is Fe8-2x3+[(AS1-xSx)O4]6(OH)6.5H20; x is about 0.2.

Crystals are orthorhombic, perhaps Pbcm or Pbc21, with a = 6.416, b 19.45, c = 8.941 Å. The strongest diffraction lines are [d in Å, (hkl), (I)] 9.75 (020) (10); 3.208 (200,132) (9); 3.047 (061,220) (5); 4.476 ({002) (4) and 2.680 (240,113) (4). The mineral is optically negative with a small 2V; α = 1.94, β = 2.05, γ = 2.06. Hardness = 3, Dmeas = 4.23, Dcalc = 4.15 g/cm3 for Z = 2.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2014

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References

Nolan, T. B. (1935) The Gold Hill Mining District Utah. U.S.G.S. Prof. Paper, 177.CrossRefGoogle Scholar