Synthesis and crystal structure of the low-temperature modification of lithium potassium zinc diphosphate LiKZnP2O7 |
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Authors: | A E Lapshin M A Petrova |
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Affiliation: | 1. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, nab. Makarova 2, St. Petersburg, 199034, Russia
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Abstract: | A new polymorphic modification, α-LiKZnP2O7, has been synthesized, which is a low-temperature modification of the LiKZnP2O7 compound. The crystal structure is determined by the Rietveld method from the X-ray powder diffraction data. The compound crystallizes in the monoclinic system (space group Pc, a = 12.3621(3) Å, b = 5.0655(1) Å, c = 10.2365(3) Å, β = 90.88(1)°, Z = 2) and has a framework structure similar to that of the high-temperature β phase. The framework is formed by the diphosphate groups and the oxygen tetrahedra of the zinc and lithium atoms, which statistically uniformly occupy equivalent positions in the structure. |
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