The new diffraction patterns of the low- and high-temperature phases of Li0.87Hf2.032(PO4)(3) and LiSn2(PO4)(3) are given and indexed on the basis of a structure refinement from neutron powder data using Rietveld method. The two isotypic compounds present a reversible phase transition: triclinic (LT, space group P (1) over bar) reversible arrow rhombohedral (HT, space group R (3) over bar c) which proceeds by topotactic distortion of the structural skeleton. (C) 1999 International Centre for Diffraction Data. [S0885-7156(98)00702-7].
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Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USAUniv Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA
Xie, Hui
Li, Yutao
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Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R ChinaUniv Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA
Li, Yutao
Goodenough, John B.
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Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USAUniv Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA