CRYSTAL CHEMISTRY OF LEAD OXIDE CHLORIDES. II. CRYSTAL STRUCTURE OF PB7O4(OH)4CL2
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dc.contributor.author | Krivovichev S.V. | |
dc.contributor.author | Burns P.C. | |
dc.date.accessioned | 2021-09-23T04:09:46Z | |
dc.date.available | 2021-09-23T04:09:46Z | |
dc.date.issued | 2002 | |
dc.identifier | https://elibrary.ru/item.asp?id=13407949 | |
dc.identifier.citation | European Journal of Mineralogy, 2002, 14, 1, 135-139 | |
dc.identifier.issn | 0935-1221 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/30512 | |
dc.description.abstract | The crystal structure of Pb7O4(OH)(4)Cl-2 (monoclinic, C112(i), a=5.791(2), b=12.998(4), c=19.330(6) Angstrom, gamma=90.089(3)degrees, V=1455.1(8) Angstrom(3)) has been solved by direct methods and refined to R1=0.061 using X-ray diffraction data collected from a crystal twinned on (010). There are seven symmetrically independent Pb2+ cations in the structure. Each has a strongly distorted coordination polyhedron due to stereochemically active s(2) lone electron pairs on the Pb2+ cations. The structure is based on [O2Pb3] double chains extending along [100] formed by edge-sharing (OPb4) oxocentered tetrahedra. Hydroxyl groups form two short (OH)-Pb bonds that result in (OH)Pb-2 dimers. The (OH)Pb-2 dimers link the [O2Pb3] chains into a three-dimensional framework with channels parallel to [100] that are occupied by Cl- anions. | |
dc.title | CRYSTAL CHEMISTRY OF LEAD OXIDE CHLORIDES. II. CRYSTAL STRUCTURE OF PB7O4(OH)4CL2 | |
dc.type | Статья |
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