A2BBi2(PO4)2(P2O7) (A = K, Rb, B = Pb, Cd): the Effect of Cation Sizes on Structural Evolution

doi:10.1002/ejic.202000716

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/120775

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Title:	A2BBi2(PO4)2(P2O7) (A = K, Rb, B = Pb, Cd): the Effect of Cation Sizes on Structural Evolution
Authors:	Qi, Lu;Chen, Zhaohui;Li, Lu;Jing, Qun;Li, Na;Jiang, Zhongqi;Dong, Xiaoyu;Lee, Ming-Hsien
Keywords:	Mixed‐metal phosphates;A‐site cations;Difference‐value;Theoretical calculations
Date:	2020-09
Issue Date:	2021-05-07 12:10:27 (UTC+8)
Abstract:	Two homologous new mixed‐metal phosphates K2PbBi2(PO4)2(P2O7) (I) and Rb2CdBi2(PO4)2(P2O7) (II) were successfully synthesized in A2BBi2(PO4)2(P2O7) (A = K, Rb, B = Pb, Cd) system through the traditional high‐temperature solid‐phase method. The single crystal structures of the two compounds are shown to be the unique three‐dimensional (3D) framework composed of different types of layers, but not isomorphic. We compared series compounds A2PbBi2(PO4)2(P2O7) (A = K, Rb, Cs), which are isomorphic and crystallize in the same space group Pnma. It is noteworthy that they are distinct different in degree of structural disorder, which is tuned by A‐site cations. The effect of A‐site cations is recognized by analyzing the disorder degree in three related structures and other available 182 mixed‐metal phosphates. To the best of our knowledge, such structural analysis is rarely reported in inorganic phosphates and the cation modulation strategy can be used to guide structural disorder according to the difference‐value (D‐value) of cation radii. Furthermore, the syntheses, thermal analysis, relevant spectroscopic measurements and theoretical calculations for I and II compounds were also discussed.
Relation:	European Journal of Inorganic Chemistry 2020(42), p.4007-4014
DOI:	10.1002/ejic.202000716
Appears in Collections:	[物理學系暨研究所] 期刊論文

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