Brett A. Hunter

Australian Nuclear Science and Technology Organisation

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Allan Pring

University of Adelaide

Brendan J. Kennedy

University of Sydney

Anti Kolonial Prodjosantoso

Yogyakarta State University

Kia S. Wallwork

Australian Synchrotron

Max R. Taylor

University of Oxford

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University of Adelaide

Flinders University

University of Sydney

University of South Australia

Australian Nuclear Science and Technology Organisation

South Australian Museum

Mineral Resources

University of Tsukuba

East China University of Science and Technology

Radboud University Nijmegen

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A model for the structure of the hydrated aluminum phosphate, kingite determined by ab initio powder diffraction methods

American Mineralogist (2003)

Kia S. Wallwork Allan Pring Max R. Taylor Brett A. Hunter

[The crystal structure of kingite, Al3(PO4)2(F5OH)2·B(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) A, σ = 97.60(1), β= 100.88(1), γ = 96.01(1)°, V= 653.0(1) A3, 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(P04)2(OH)3·5H2O, and mitryaevaite, A15(PO4)2[(P,S)O3(OH,O)]2F2(OH)2(H2O)8-6.48H2O, are briefly discussed.

Triclinic crystal system

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10.2138/am-2003-0127

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Citations (11)

Phase separation induced by hydration of the mixed Ca/Sr aluminates Ca3−xSrxAl2O6

Cement and Concrete Research (2002)

Anti Kolonial Prodjosantoso Brendan J. Kennedy Brett A. Hunter

10.1016/s0008-8846(01)00737-2

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Citations (15)