| Reference Type | Journal (article/letter/editorial) |
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| Title | The crystal structures of sjögrenite and pyroaurite |
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| Journal | Mineralogical Magazine and Journal of the Mineralogical Society |
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| Authors | Ingram, L. | Author |
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| Taylor, H. F. W. | Author |
| Year | 1967 (December) | Volume | 36 |
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| Issue | 280 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_36/36-280-465.pdf+ |
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| DOI | doi:10.1180/minmag.1967.036.280.01Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 6109 | Long-form Identifier | mindat:1:5:6109:8 |
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| GUID | 0 |
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| Full Reference | Ingram, L., Taylor, H. F. W. (1967) The crystal structures of sjögrenite and pyroaurite. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (280) 465-479 doi:10.1180/minmag.1967.036.280.01 |
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| Plain Text | Ingram, L., Taylor, H. F. W. (1967) The crystal structures of sjögrenite and pyroaurite. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (280) 465-479 doi:10.1180/minmag.1967.036.280.01 |
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| In | (1966) Mineralogical Magazine Vol. 36 (280) Mineralogical Society |
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| Abstract/Notes | SummaryThe crystal structures of sjögrenite and pyroaurite, two stacking modifications of approximate composition Mg6Fe2(OH)16(CO3).4H2O, have been determined by X-ray diffraction using three-dimensional methods. Sjögrenite is hexagonal, with a 3·13, c 15·66 Å, space group P63/mmc , Z = ¼; pyroaurite is rhombohedral, with aH 3·13, cH 23·49 Å, space group R3̄m or R3m, Z = ⅜. Both structures are based on brucite-like layers, with magnesium and iron distributed among the octahedral positions. The cations appear to be largely disordered, although ordered regions may occur in some crystals. Between the brucite-like layers are the water molecules and carbonate groups. These are statistically arranged, with their oxygen atoms distributed among a larger number of possible sites. |
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