| Reference Type | Journal (article/letter/editorial) |
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| Title | The crystal structure of ammoniojarosite, (NH4)Fe3(SO4)2(OH)6 and the crystal chemistry of the ammoniojarosite–hydronium jarosite solid-solution series |
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| Journal | Mineralogical Magazine |
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| Authors | Basciano, L. C. | Author |
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| Peterson, R. C. | Author |
| Year | 2007 (August) | Volume | 71 |
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| Issue | 4 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/rruff_1.0/uploads/ammoniojarosite.pdf+ |
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| DOI | doi:10.1180/minmag.2007.071.4.427Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 243767 | Long-form Identifier | mindat:1:5:243767:9 |
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| GUID | 0 |
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| Full Reference | Basciano, L. C., Peterson, R. C. (2007) The crystal structure of ammoniojarosite, (NH4)Fe3(SO4)2(OH)6 and the crystal chemistry of the ammoniojarosite–hydronium jarosite solid-solution series. Mineralogical Magazine, 71 (4) 427-441 doi:10.1180/minmag.2007.071.4.427 |
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| Plain Text | Basciano, L. C., Peterson, R. C. (2007) The crystal structure of ammoniojarosite, (NH4)Fe3(SO4)2(OH)6 and the crystal chemistry of the ammoniojarosite–hydronium jarosite solid-solution series. Mineralogical Magazine, 71 (4) 427-441 doi:10.1180/minmag.2007.071.4.427 |
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| Abstract/Notes | The atomic structure of ammoniojarosite,[(NH4)Fe3(SO4)2(OH)6], a = 7.3177(3) Å, c = 17.534(1) Å, space group Rm, Z = 3, has been solved using single-crystal X-ray diffraction (XRD) to wR 3.64% and R 1.4%. The atomic coordinates of the hydrogen atoms of the NH4 group were located and it was found that the ammonium group has two different orientations with equal probability. Hydronium commonly substitutes into jarosite group mineral structures and samples in the ammoniojarosite–hydronium jarosite solid-solution series were synthesized and analysed using powder XRD and Rietveld refinement. Changes in unit-cell dimensions and bond lengths are noted across the solidsolution series. The end-member ammoniojarosite synthesized in this study has no hydronium substitution in the A site and the unit-cell dimensions determined have a smaller a dimension and larger c dimension than previous studies. Two natural ammoniojarosite samples were analysed and shown to have similar unit-cell dimensions to the synthetic samples. Short-wave infrared and Fourier transform infrared spectra were collected for samples from the NH4–H3O jarosite solid-solution series and the differences between the end-members were significant. Both are useful tools for determining NH4 content in jarosite group minerals. |
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