Reference Type | Journal (article/letter/editorial) |
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Title | Xocomecatlite, Cu3TeO4(OH)4, and tlalocite, Cu10Zn6(TeO3)(TeO4)2Cl(OH)25·27H2O, two new minerals from Moctezuma, Sonora, Mexico |
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Journal | Mineralogical Magazine |
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Authors | Williams, S. A. | Author |
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Year | 1975 (September) | Volume | 40 |
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Page(s) | 221-226 | Issue | 311 |
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Publisher | Mineralogical Society |
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Download URL | https://rruff.info/doclib/MinMag/Volume_40/40-311-221.pdf+ |
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DOI | doi:10.1180/minmag.1975.040.311.01Search in ResearchGate |
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Classification | Not set | LoC | Not set |
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Mindat Ref. ID | 6867 | Long-form Identifier | mindat:1:5:6867:7 |
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GUID | b7bd89b2-c944-479f-bb32-acf37aa20b7c |
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Full Reference | Williams, S. A. (1975) Xocomecatlite, Cu3TeO4(OH)4, and tlalocite, Cu10Zn6(TeO3)(TeO4)2Cl(OH)25·27H2O, two new minerals from Moctezuma, Sonora, Mexico. Mineralogical Magazine, 40 (311) 221-226 doi:10.1180/minmag.1975.040.311.01 |
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Plain Text | Williams, S. A. (1975) Xocomecatlite, Cu3TeO4(OH)4, and tlalocite, Cu10Zn6(TeO3)(TeO4)2Cl(OH)25·27H2O, two new minerals from Moctezuma, Sonora, Mexico. Mineralogical Magazine, 40 (311) 221-226 doi:10.1180/minmag.1975.040.311.01 |
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In | (1975, September) Mineralogical Magazine Vol. 40 (311) Mineralogical Society |
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Abstract/Notes | Xocomecatlite and tlalocite were found at the Bambollita mine near Moctezuma, Sonora. Xocomecatlite is probably orthorhombic, and an indexed cell based on the powder data gave a 12.140 A, b 14.318, c 11.662. Based on this cell, the empirical contents are Cu36.6 Zn1.7 (TeO4)12.5 (OH)51.6 or Cu3TeO4(OH)4. Tellurate was found both microchemically and by spectrophotometry. Colour rich green (R.H.S. 132A) with pale streak, H = 4. Optically negative with α = 1.775, β = 1.900, γ = 1.920. G = 4.65.Tlalocite is optically orthorhombic but the cell could not be indexed; only powder data are presented. Chemical analysis showed both tellurite and tellurate and led to the formulaColour pale blue (R.H.S. 121A) with a whitish streak; H = 1, gummy and sectile. G = 4.55.Plotting stability fields for various Te species at 25°C in terms of Eh and pH showed that TeO42−.aq can exist in nature over a wide pH range, but only under extreme conditions of oxidation. |
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