Hostname: page-component-848d4c4894-ttngx Total loading time: 0 Render date: 2024-05-27T23:21:08.726Z Has data issue: false hasContentIssue false
  • English
  • Français

Tlapallite, a new mineral from Moctezuma, Sonora, Mexico

Published online by Cambridge University Press:  05 July 2018

S. A. Williams  and
Marjorie Duggan
S. A. Williams
Affiliation:
Phelps Dodge Corporation, Douglas, Arizona 85607, U.S.A.
Marjorie Duggan
Affiliation:
Phelps Dodge Corporation, Douglas, Arizona 85607, U.S.A.
Get access Rights & Permissions [Opens in a new window]

Summary

Tlapallite is a new mineral found in 1972 at the Bambollita (La Oriental) mine near Moctezuma, Sonora. Also recently found in old specimens from Tombstone, Arizona. Data for type (Mexican) material: Colour viridian green RHS-128A with pale streak, H = 3, Dcalc = 5·05 g/cm3. Crystals monoclinic, class unknown. Indexing based on Ito method gave a cell: a = 11·97 Å, b = 9·11, c = 15·66, β = 90 ° 36′. Strongest lines: 11·972 Å (10), 2·985 (10), 3·540 (6), 5·946 (5), 2·887 (5), 4·731 (4), 3·372 (4), 3·282 (4). Similar data obtain for Tombstone. Chemical analysis for type material yielded the formula H6Ca2Cu3(SO4)(TeO3)4,TeO6 with Te4+:Te6+ = 4:1. However, analysis of the Tombstone material indicates a more general formula H6(Ca, Pb)2(Cu, Zn)3(SO4) (TeO3)4,TeO6. The better data from this material indicate Z = 4, Dcalc = 5·465 vs Dmeas = 5·38. Characterized by extreme birefringence, α = 1·815, β = γ = 1·960; for Tombstone α = 1·955, β = γ = 2·115.

Named from the Nahua word tlapalli, meaning paint, in allusion to its mode of occurrence at the type locality.

Type
Research Article
Information
Mineralogical Magazine , Volume 42 , Issue 322 , June 1978 , pp. 183 - 186
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

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

Jones, (P. A.) and Stephen, (W. I.), 1973. The indirect spectrophotometric determination of the sulphate ion with 2-Aminoperimidine. Anal. Chim. Acta, 64, 85–92.CrossRefGoogle Scholar