| Reference Type | Journal (article/letter/editorial) |
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| Title | Obradovicite, a new complex arsenate-molybdate from Chuquicamata, Chile |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Finney, J. J. | Author |
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| Williams, S. A. | Author |
| Hamilton, R. D. | Author |
| Year | 1986 (June) | Volume | 50 |
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| Issue | 356 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_50/50-356-283.pdf+ |
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| DOI | doi:10.1180/minmag.1986.050.356.12Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 3849 | Long-form Identifier | mindat:1:5:3849:6 |
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| GUID | 0 |
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| Full Reference | Finney, J. J., Williams, S. A., Hamilton, R. D. (1986) Obradovicite, a new complex arsenate-molybdate from Chuquicamata, Chile. Mineralogical Magazine, 50 (356) 283-284 doi:10.1180/minmag.1986.050.356.12 |
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| Plain Text | Finney, J. J., Williams, S. A., Hamilton, R. D. (1986) Obradovicite, a new complex arsenate-molybdate from Chuquicamata, Chile. Mineralogical Magazine, 50 (356) 283-284 doi:10.1180/minmag.1986.050.356.12 |
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| In | (1986, June) Mineralogical Magazine Vol. 50 (356) Mineralogical Society |
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| Abstract/Notes | AbstractObradovicite, ideal formula H4CuFe2(AsO4) (MoO4)5 · 12H2O, occurs as fine pea-green clusters on quartz from Chuquicamata, Chile. Obradovicite is orthorhombic, space group Pcnm; a = 15.046, b = 14.848, c = 11.056 Å, Z = 4. The strongest powder pattern lines are (d Å, I, hkl) 10.565(8)(110), 8.906(10)(101), 7.424(8)(020), 5.733(5)(211), 3.761(3)(400), 3.686(4)(032), 3.466(3)(411), 3.344(4)(420). It is biaxial positive with α = 1.790, β = 1.798, γ = 1.811, 2Vz = 81°, a = Z, b = X, c = Y, with strong dispersion and pale yellow pleochroism. Specific gravity is 3.55 (meas.) or 3.68 (calc.) and the Mohs hardness is 2½ with no obvious cleavage. Obradovicite is similar to betpakdalite and sodium-betpakdalite except that it contains essential Cu and K (K > Na). |
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