| Reference Type | Journal (article/letter/editorial) |
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| Title | Crystal structure of coalingite |
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| Journal | Mineralogical Magazine |
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| Authors | Pastor-Rodriguez, J. | Author |
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| Taylor, H. F. W. | Author |
| Year | 1971 (September) | Volume | 38 |
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| Issue | 295 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_38/38-295-286.pdf+ |
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| DOI | doi:10.1180/minmag.1971.038.295.02Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 6475 | Long-form Identifier | mindat:1:5:6475:4 |
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| GUID | 0 |
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| Full Reference | Pastor-Rodriguez, J., Taylor, H. F. W. (1971) Crystal structure of coalingite. Mineralogical Magazine, 38 (295) 286-294 doi:10.1180/minmag.1971.038.295.02 |
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| Plain Text | Pastor-Rodriguez, J., Taylor, H. F. W. (1971) Crystal structure of coalingite. Mineralogical Magazine, 38 (295) 286-294 doi:10.1180/minmag.1971.038.295.02 |
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| In | (1971, September) Mineralogical Magazine Vol. 38 (295) Mineralogical Society |
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| Abstract/Notes | SummaryThe crystal structure of coalingite (Mg10Fe2(OH)24(CO3)·2H2O) has been determined using single-crystal X-ray methods. The mineral is trigonal, with space group Rm, aH = 3·12, cH = 37·4 Å, Z = ½, and (0001) cleavage. The structure is of a layer type, and is based on a structural element about 12·5 Å thick in the c-direction and consisting of two brucite-like layers and one disordered layer containing carbonate ions and water molecules and resembling those in sjögrenite and pyroaurite. The unit cell comprises three of these structural elements stacked together in the c-direction. The Mg2+ and Fe3+ ions are randomly distributed among all the octahedral sites of the brucite-like layers. The structure closely resembles those of sjögrenite and pyroaurite, but has two brucite-like layers between each CO32−−H2O layer where these have one. There is a tendency to random interstratification, and the crystals appear to contain intergrown regions of brucite and of sjögrenite or pyroaurite. Coalingite-K probably has a similar structure, but with three brucite-like layers between each -H2O layer; its idealized formula is probably Mg16Fe2(OH)36(CO3).2H2O. |
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