Journal
INORGANIC CHEMISTRY FRONTIERS
Volume 2, Issue 3, Pages 298-305Publisher
CHINESE CHEMICAL SOC
DOI: 10.1039/c4qi00202d
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- National Natural Science Foundation of China [21225104, 21233009, 91422303, 21301175, 21171168]
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New quaternary selenides, Cs[RE9Mn4Se18] (RE = Ho-Lu), have been synthesized by high temperature solid state reactions of elements with a reactive CsCl flux. These compounds adopt the BaV13O18-structure type in the trigonal space group R (3) over bar (no. 148) with a = 17.4867(8)-17.263(2) angstrom, c = 9.7996(8)-9.681(2) angstrom and A= 3. The major structure motif is the 3D network that is constructed by octahedra of MSe6 (centered by disordered Mn and RE) and RESe6, in which closed cavities of cuboctahedra Cs@Se-12 are embedded. This work extends the previously established empirical A/M-structure correlation in the ternary A/RE/Q system into quaternary A/RE/TM/Q, and A/M = 0.08 (A = the number of alkali metals, M = the sum of the numbers of RE and TM metals) represents the minimum ending value. The syntheses, properties, and theoretical analyses of the title compounds are also discussed.
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