Abstract
Crystal structures of double calcium and alkali metal phosphates described by the general formula Ca10 M(PO4)7(M = Li, Na, K) have been studied by the Rietveld method. The lattice parameters are a = 10.4203(1) and c = 37.389(1) Å (for M = Li), a = 10.4391(1) and c = 37.310(1) Å (for M = Na), and a = 10.4229(1) and c = 37.279(2) Å (for M = K); sp. gr. R3c, Z = 6. The specific features of the distribution of alkali metal cations over the structure positions are discussed.
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Translated from Kristallografiya, Vol. 45, No. 1, 2000, pp. 19–26.
Original Russian Text Copyright © 2000 by Morozov, Belik, Kotov, Presnyakov, Khasanov, Lazoryak.
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Morozov, V.A., Belik, A.A., Kotov, R.N. et al. Crystal structures of double calcium and alkali metal phosphates Ca10 M(PO4)7(M = Li, Na, K). Crystallogr. Rep. 45, 13–20 (2000). https://doi.org/10.1134/1.171129
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DOI: https://doi.org/10.1134/1.171129