A MODEL FOR THE STRUCTURE OF THE HYDRATED ALUMINUM PHOSPHATE, KINGITE DETERMINED BY AB INITIO POWDER DIFFRACTION METHODS
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dc.contributor.author | Wallwork K.S. | |
dc.contributor.author | Pring A. | |
dc.contributor.author | Taylor M.R. | |
dc.contributor.author | Hunter B.A. | |
dc.date.accessioned | 2021-11-28T04:25:39Z | |
dc.date.available | 2021-11-28T04:25:39Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=14291206 | |
dc.identifier.citation | American Mineralogist, 2003, 88, 1, 235 | |
dc.identifier.issn | 0003-004X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/32590 | |
dc.description.abstract | The crystal structure of kingite, Al3(PO4)2(F,OH)2·8(H2O,OH), a secondary mineral from a Cambrian-Precambrian phosphate deposit at Tom’s Quarry, near Kapunda, South Australia, has been determined from a powder sample using synchrotron X-ray diffraction data. The structure was determined ab initio by direct methods and refined to RBragg = 0.022 and Rwp = 0.039 using the Rietveld method. The triclinic structure was solved and refined in the space group P1̅, a = 9.377(1), b = 10.113(1), c = 7.138(1) Å, α = 97.60(1), β = 100.88(1), γ = 96.01(1)°, V = 653.0(1) Å3 , Z = 2. The structure of kingite contains finite strings of three corner sharing Alϕ6 octahedra (where ϕ represents O, OH−, F−, or H2O). These strings are cross-linked via PO4 tetrahedra to produce layers that are perpendicular to [100]. The layers are linked via hydrogen bonding through H2O located in the interlayer space. Kingite is shown to have a different stoichiometry to that reported earlier. The relationship of kingite to the structures of wavellite, Al3(PO4)2(OH)3·5H2O, and mitryaevaite, Al5(PO4)2[(P,S)O3(OH,O)]2F2(OH)2(H2O)8·6.48H2O, are briefly discussed. | |
dc.subject | Kingite | |
dc.title | A MODEL FOR THE STRUCTURE OF THE HYDRATED ALUMINUM PHOSPHATE, KINGITE DETERMINED BY AB INITIO POWDER DIFFRACTION METHODS | |
dc.type | Статья |
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