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- W2950678086 abstract "Ten quaternary arsenides AM1.5Tt0.5As2 (A = Na, K, Rb; M = Zn, Cd; Tt = Si, Ge, Sn) have been prepared by stoichiometric reactions of the elements at 600–650 °C. Seven of them (NaZn1.5Si0.5As2, NaZn1.5Ge0.5As2, NaZn1.5Sn0.5As2, NaCd1.5Sn0.5As2, KZn1.5Sn0.5As2, KCd1.5Sn0.5As2, RbCd1.5Sn0.5As2) adopt the trigonal CaAl2Si2-type structure (Pearson symbol hP5, space group P3̅m1, Z = 1, a = 4.0662(3)–4.4263(7) Å, c = 7.4120(5)–8.4586(14) Å), whereas the remaining three (KZn1.5Si0.5As2, KZn1.5Ge0.5As2, RbZn1.5Ge0.5As2) adopt the tetragonal ThCr2Si2-type structure (Pearson symbol tI10, space group I4/mmm, Z = 2, a = 4.0613(10)–4.1157(5) Å, c = 14.258(3)–14.662(2) Å). Both structure types contain anionic [M1.5Tt0.5As2] slabs that are built from edge-sharing tetrahedra and that stack alternately with nets of A cations. A structure map delineates the formation of these structure types for AM1.5Tt0.5As2 as a function of simple radius ratios. Although these arsenides have charge-balanced formulations, band structure calculations on NaZn1.5Tt0.5As2 (Tt = Si, Ge, Sn) indicate that semimetallic behavior is predicted as a result of overlap of the valence and conduction bands." @default.
- W2950678086 created "2019-06-27" @default.
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- W2950678086 date "2013-03-04" @default.
- W2950678086 modified "2023-10-16" @default.
- W2950678086 title "Quaternary Arsenides <i>AM</i><sub>1.5</sub><i>Tt</i><sub>0.5</sub>As<sub>2</sub> (<i>A</i> = Na, K, Rb; <i>M</i> = Zn, Cd; <i>Tt</i> = Si, Ge, Sn): Size Effects in CaAl<sub>2</sub>Si<sub>2</sub>- and ThCr<sub>2</sub>Si<sub>2</sub>-Type Structures" @default.
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- W2950678086 doi "https://doi.org/10.1021/ic302627n" @default.
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