| Reference Type | Journal (article/letter/editorial) |
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| Title | Crystal structure of macphersonite (Pb4SO4(CO3)2(OH)2): comparison with leadhillite |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Steele, Ian M. | Author |
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| Pluth, Joseph J. | Author |
| Livingstone, Alec | Author |
| Year | 1998 (August) | Volume | 62 |
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| Issue | 4 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_62/62-4-451.pdf+ |
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| DOI | doi:10.1180/002646198547828Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 294 | Long-form Identifier | mindat:1:5:294:1 |
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| GUID | 0 |
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| Full Reference | Steele, Ian M., Pluth, Joseph J., Livingstone, Alec (1998) Crystal structure of macphersonite (Pb4SO4(CO3)2(OH)2): comparison with leadhillite. Mineralogical Magazine, 62 (4) 451-459 doi:10.1180/002646198547828 |
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| Plain Text | Steele, Ian M., Pluth, Joseph J., Livingstone, Alec (1998) Crystal structure of macphersonite (Pb4SO4(CO3)2(OH)2): comparison with leadhillite. Mineralogical Magazine, 62 (4) 451-459 doi:10.1180/002646198547828 |
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| Abstract/Notes | The crystal structure of macphersonite (Pb4SO4(CO3)2(OH)2, Pcab, a = 9.242(2), b = 23.050(5), c = 10.383(2) Ć
) from Leadhills, Scotland has been determined to an R = 0.053. The structure has many features in common with its polymorph leadhillite including three distinct types of layers. Layer A includes sulphate tetrahedra, Layer B is composed of Pb and OH, while Layer C is composed of Pb and CO3 with topology identical to that in cerussite. In both macphersonite and leadhillite these layers are stacked along [010] as ā¦BABCCBABCCā¦ The double CC layer is almost identical in the two structures and forms a structural backbone and occurs in other structures including hydrocerussite and plumbonacrite. The sulphate layer shows the greatest difference between the two structures and can be described by a pattern of up or down pointing tetrahedra. For macphersonite the sequence along [001] is ā¦UDUDUDā¦ while in leadhillite the sequence along [010] is ā¦UDDUUDDUā¦ This latter sequence effectively doubles b relative to the equivalent direction in macphersonite. Susannite, a third polymorph, may have yet another sequence of sulphates to give trigonal symmetry; by heating leadhillite, displacive movements of sulphate groups may occur with a conversion to susannite. |
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