| Reference Type | Journal (article/letter/editorial) |
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| Title | X-ray and electron diffraction study of penfieldite: average structure and multiple cells |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Merlino, S. | Author |
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| Pasero, M. | Author |
| Perchiazzi, N. | Author |
| Gianfagna, A. | Author |
| Year | 1995 (June) | Volume | 59 |
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| Issue | 395 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_59/59-395-341.pdf+ |
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| DOI | doi:10.1180/minmag.1995.059.395.17Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 2649 | Long-form Identifier | mindat:1:5:2649:3 |
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| GUID | 0 |
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| Full Reference | Merlino, S., Pasero, M., Perchiazzi, N., Gianfagna, A. (1995) X-ray and electron diffraction study of penfieldite: average structure and multiple cells. Mineralogical Magazine, 59 (395) 341-347 doi:10.1180/minmag.1995.059.395.17 |
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| Plain Text | Merlino, S., Pasero, M., Perchiazzi, N., Gianfagna, A. (1995) X-ray and electron diffraction study of penfieldite: average structure and multiple cells. Mineralogical Magazine, 59 (395) 341-347 doi:10.1180/minmag.1995.059.395.17 |
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| In | (1995, June) Mineralogical Magazine Vol. 59 (395) Mineralogical Society |
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| Abstract/Notes | AbstractPenfieldite is a lead hydroxychloride mineral with composition Pb2Cl3(OH). It belongs to the hexagonal system, space group P, a = 11.393(3), c = 4.024(1) Å. The 4 Å c parameter corresponds to the basic sub-cell, whereas modulated structures are known with a true c axis 12 times longer. The average crystal structure of penfieldite has been solved with direct methods and refined to Rw = 0.041 for 871 refections collected with Mo-Kα radiation. The chemical and structural relationships between penfeldite and laurelite, Pb2F3(F,Cl,OH), are briefly discussed. An electron diffraction study of penfieldite revealed the occurrence, besides the common modulated structure with C = 12c, of domains with a 15c periodicity. Moreover, a 9c periodicity has been observed in crystals heated at 180°C Penfieldite is quickly destroyed above 200°C. |
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