| Reference Type | Journal (article/letter/editorial) |
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| Title | Tlapallite, a new mineral from Moctezuma, Sonora, Mexico |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Williams, S. A. | Author |
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| Duggan, Marjorie | Author |
| Year | 1978 (June) | Volume | 42 |
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| Page(s) | 183-186 | Issue | 322 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_42/42-322-183.pdf+ |
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| DOI | doi:10.1180/minmag.1978.042.322.03Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 2894 | Long-form Identifier | mindat:1:5:2894:7 |
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| GUID | 7bebdb9a-9a3c-4a62-989e-6c5707d9a9c2 |
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| Full Reference | Williams, S. A., Duggan, Marjorie (1978) Tlapallite, a new mineral from Moctezuma, Sonora, Mexico. Mineralogical Magazine, 42 (322) 183-186 doi:10.1180/minmag.1978.042.322.03 |
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| Plain Text | Williams, S. A., Duggan, Marjorie (1978) Tlapallite, a new mineral from Moctezuma, Sonora, Mexico. Mineralogical Magazine, 42 (322) 183-186 doi:10.1180/minmag.1978.042.322.03 |
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| In | (1978, June) Mineralogical Magazine Vol. 42 (322) Mineralogical Society |
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| Abstract/Notes | 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. |
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