Korrektur zur Kristallstruktur von „Cs4PbO3”︁ und die Strukturverwandtschaft zwischen den Modifikationen von Cs4PbO4 |
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Authors: | Ulrich Mü ller,Kirsten Bernet,Rudolf Hoppe |
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Abstract: | Correction of the Crystal Structure of “Cs4PbO3” and the Structural Relationship between the Modifications of Cs4PbO4 The compound that has been described as Cs4PbO3 really is Cs4PbO4. It does not crystallize in the space group P21, as assumed, but in P21/c. The observed fictitiuous violation of the extinction law for the c glide plane is due to twinning. The structure was refined using the original data as well as new data from an untwinned crystal. The denomination β-Cs4PbO4 is used to distinguish this structure from another known modification (α-Cs4PbO4). Both structures, α-Cs4PbO4 and β-Cs4PbO4, can be derived from the sphere packing of γ-plutonium when certain voids in its packing are occupied with oxygen atoms. |
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Keywords: | Caesium tetraoxoplumbate crystal structure |
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