Sodium scandium arsenate, Na3Sc2(AsO4)3.
Nasicon-type trisodium discandium tris(arsenate), Na3Sc2(AsO4)3, contains a polyhedral network of vertex-sharing octahedral ScO6 and tetrahedral AsO4 units [d(av)(Sc-O) = 2.089 (2) A and d(av)(As-O) = 1.672 (2) A] encapsulating two types of Na+ species. The sodium site occupancies are similar to those of the equivalent species in beta-Na3Sc2(PO4)3.
Harrison
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WT
Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, Scotland. w.harrison@abdn.ac.uk
Phillips
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ML