Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-28T00:26:10.902Z Has data issue: false hasContentIssue false
  • English
  • Français

Apachite and gilalite, two new copper silicates from Christmas, Arizona

Published online by Cambridge University Press:  05 July 2018

F. P. Cesbron  and
S. A. Williams
F. P. Cesbron
Affiliation:
Laboratoire de Minéralogie-Cristallographie, place Jussieu, 75230 Paris Cedex 05, France
S. A. Williams
Affiliation:
Box 872, Douglas, Arizona 85607, USA
Get access Rights & Permissions [Opens in a new window]

Summary

Both new species are retrograde or mesogene minerals that occur in tactites at the Christmas mine, Gila County, Arizona (USA). Gilalite is green, H = 2, D = 2.82. Biaxial (—), 2V small, α = 1.560, β = γ = 1.635. No single crystals found; strongest lines at 13.49 Å, (10); 10.97 (5); 7.786 (5). Analysis gave CuO 36.2%, MgO 2.3, CaO 3.8, MnO 0.5, SiO2 41.5, H2O 14.6, close to Cu5Si6O17·7H2O.

Apachite is blue, H = 2, D = 2.80. Biaxial (—), 2V small, α = 1.610, β = γ = 1.650. No single crystals found. Strongest lines are 12.90 Å (10); 3.168 (7); 7.663 (5). Analysis gave CuO 43.6%, FeO 0.3, MgO 1.7, CaO 1.8, SiO2 40.8, H2O 13.8, close to Cu9Si10O29·11H2O.

Type
Research Article
Information
Mineralogical Magazine , Volume 43 , Issue 329 , March 1980 , pp. 639 - 641
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1980

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Eastlick, (J. T.), 1968. Ore Deposits of the United States, 1933-1961, 11, AIME, New York.Google Scholar
Perry, (D. V.), 1969. Econ. Geol. 64, 255-70.CrossRefGoogle Scholar