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Ein neuer Typ quaternärer Oxometallate: K3Na2[InO4]
Authors:H. Glaum  R. Hoppe
Affiliation:(1) Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität Gießen, D-W-6300 Gießen, Bundesrepublik Deutschland
Abstract:With K3Na2[InO4] the first example of new kind of oxides of the type A3Aprime2[MO4] with R(A)>R(Aprime) was prepared in form of colourless single crystals by oxidation of the intermetallic compound ldquoKNaIn2rdquo. Intimate mixtures of the educts (K2O2: ldquoK0.5Na0.5Inrdquo=1.2:1) were heated in sealed Ag-tubes (380 °C, 2 d, then 480 °C, 5 d). K3Na2[InO4] crystallizes monoclinic (P21/n) witha=1012.6 pm,b=969.9 pm,c=725.4 pm, beta=91.02°;Z=4. The crystal structure was elucidated by four-circle diffractometer (PW 1100, Ag-Kamacr, 6047Io(hkl),R=7.3%,Rw=4.4%). The new typ forms a very complicated 3-dimensional networkinfin3{Na2InO4} stuffed by 3 K+. The Madelung part of lattice energy, MAPLE, is calculated and discussed.
Professor Edwin Hengge zum 60. Geburtstag am 21. Juli 1990 gewidmet
Keywords:Oxoindate  K3Na2[InO4]  Structure  MAPLE  Charge distribution
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