Cs4BiAs3Se7: A Novel Bismuth‐Selenoarsenate with Infinite [BiAs3Se7]4– Chains Containing Two Different Anions, [AsSe3]3– and trans‐[As2Se4]4– |
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Authors: | Michael Wachhold,Mercouri G. Kanatzidis |
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Abstract: | A new phase has been prepared by methanolothermal reaction of Cs2CO3, BiCl3 and Li3AsSe3 at 130 °C for 36 hours. Cs4BiAs3Se7 ( I ) reveals the first Bi‐selenoarsenate polyanionic chain [Bi(As2Se4)(AsSe3)]4–, consisting of Bi3+ ions in a distorted octahedral environment of [AsSe3]3– and trans‐[As2Se4]4– units. The latter anion consists of a central “As24+” dumb‐bell whereby two Se atoms are attached to each of the As atoms. Structural Data: Space Group P21/n, a = 13.404(4) Å, b = 23.745(8) Å, c = 13.880(4) Å, β = 99.324(6)°, Z = 8. |
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Keywords: | Bismuth chalcogenides Selenoarsenates Crystal structure |
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