Zeitschrift für anorganische und allgemeine Chemie · 1993 · 42 citations · 8 references
Natural SciencesChemistryMaterials ScienceCondensed Matter PhysicsInorganic ChemistrySolid-state ChemistryCluster CompoundsCoordination ChemistryCrystal ChemistryMagnetic Properties Of SolidsMagnetism Of Inorganic CompoundsMetal-ligand BondingMagnetic Properties Of ClustersMagnetic Properties Of Transition Metal ComplexesMolecular Metal ClustersSpace AssignmentSpace Group TheoryStructural Characterization Of ClustersZintl ClustersZintl Phases
Abstract The Rb‐In system contains only RbIn 4 (BaAl 4 type) and Rb 2 In 3 in the 0–80 at.% In region. The structure of Rb 2 In 3 consists of rubidium ions between layers of closo ‐In 6 clusters joined into sheets through exo bonds at four coplanar vertices (I4/mmm, a=6.8735 (4) Å, c=15.899 (1) Å, R(F)/R w =3.2/3.5%). The phase is isostructural with Cs 2 In 3 when a probable error in the earlier space group assignment is corrected. Rb 2 In 3 is a poor conductor (P> 10 3 μohm · cm) with a temperature‐independent magnetic susceptibility of (0 ± 4) x 10 −6 emu/mol after core and orbital corrections. The corresponding Zintl phase (closed shell configuration) predicted on the basis of conventional electron counting for the cluster network is supported by extended‐Hückel MO calculations. The structures of Rb 4 In 6 and In 4 Rb show a close, inverse relationship in the same space group.
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