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Ruizite, a new silicate mineral from Christmas, Arizona

Published online by Cambridge University Press:  05 July 2018

S. A. Williams  and
M. Duggan
S. A. Williams
Affiliation:
Phelps Dodge Corporation, Douglas, Arizona, U.S.A.
M. Duggan
Affiliation:
Phelps Dodge Corporation, Douglas, Arizona, U.S.A.
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Summary

Ruizite is a new mineral found in the mesogene calc-silicate assemblage at the Christmas mine, Gila County, Arizona. Occurs with kinoite, apophyllite, smectite, and junitoite. Colour is orange inclining to brown with pale streak, H = 5, Sp. Gr. meas. = 2·9. Crystals monoclinic 2/m, elongate on [010]; a = 11·95 Å, b = 6·17, c = 9·03, β = 91° 22½′. Probable space group P21/c with Z = 4 giving Dcalc = 2·997. Strongest lines are 11·951 Å(10), 4·190 (7), 3·116 (6), 5·092 (5), 3·644 (4), 2·951 (4), 2·591 (4), 2·132 (4). Indices are α = 1·663, β = 1·715 ‖ [010], γ = 1·734, 44° to [001] in obtuse β; 2Vα = 60·2°; inclined dispersion p > v strong. Twinned on {100}. Analysis by wet methods gave CaO = 20·57%, Mn2O3 = 23·42, SiO2 = 39·14, H2O = 16·0 leading to or CaMn3+ (SiO3)2(OH). 2H2O.

Named for its discoverer, Joe Ana Ruiz of Mammoth, Arizona

Type
Research Article
Information
Mineralogical Magazine , Volume 41 , Issue 320 , December 1977 , pp. 429 - 432
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1977

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References

Schink, (D. R.), 1965. Anal. Chem. 37, 764–5.CrossRefGoogle Scholar
Williams, (S. A.), 1976. Am. Mineral. 61, 1255-8.Google Scholar