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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1717-1720 
    ISSN: 0044-2313
    Keywords: Dipotassium Sodium Diantimonidoindate ; K2Na[InSb2] ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dikalium-Natrium-Diantimonidoindat, K2Na[InSb2], eine Verbindung mit dem Polyanionen ∞2[In2Sb2Sb4/2]6-.Die neuartige Verbindung K2Na[InSb2] bildet sich aus den Elementen bei 900 K in geschlossenen Niobampullen als silbrig glänzende plättchenförmige Kristalle. Die Verbindung ist sehr empfindlich gegen Luft und Feuchtigkeit. Die Kristallstruktur von K2NaInSb2 (Raumgruppe Cmca, No. 64, a = 14,032(2), b = 16,399(3), c = 7,009(1) Å; Z = 8; Pearsonsymbol oC48) wurde an Einkristallen bestimmt. Die Struktur enthält Paare kantenverknüpfter InSb4-Tetraeder, welche über gemeinsame Ecken zu einer zweidimensionalen anionischen infin;2[In2Sb2Sb4/2]6--Teilstruktur verknüpft sind. Die resultierenden Paare tetraedrischer Lücken sind mit Na-Kationen gefüllt. Die [In2Sb2Sb4/2]6--Schichten sind entlang der b-Achse über K-Kationen miteinander verbunden. Die gesamte Struktur kann als Ordnungsvariante der KMnP-Struktur (PbFCl-Typ) angesehen werden.
    Notes: The novel compound K2Na[InSb2] was synthesized from the elements at 900 K in sealed niobium ampoules. The compound forms plate-like crystals with silver metallic luster, which are very unstable in air and moisture. The crystal structure of K2NaInSb2 has been determined using single-crystal X-ray diffraction methods (space group Cmca (No. 64); a = 14.032(2), b = 16.399(3), c = 7.009(1) Å; Z = 8; Pearson symbol oC48). The structure contains pairs of edge-sharing InSb4 tetrahedra which are linked to four other pairs via common vertices and form a two-dimensional ∞2[In2Sb2Sb4/2]6- anionic partial structure. The resulting pairs of tetrahedral holes are filled by Na+ cations. These [In2Sb2Sb4/2]6- layers are stacked along the b-axis and are interconnected by K+ cations. The whole structure can be considered as an ordered derivative of the KMnP structure (PbFCl type).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 1015-1023 
    ISSN: 0009-2940
    Keywords: Ba14InP11 ; Zintl phase ; Tetraphosphidoindate(III) anions ; Asymmetric [P3]7- polyanions ; Interpenetrating hierarchical frameworks ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ba14InP11 was prepared from the elements in a sealed stainless steel ampoule at 1345 K. The compound is black, brittle and very sensitive to air and moisture. Ba14InP11 crystallises in the tetragonal Ca14AlSb11 type (space group I41/acd, No. 142; a = 17.097 (2) Å, c, = 8, Pearson code tI208). The structure contains isolated P3-, linear [P3]7- and tetrahedral [InP4]9- anions. The X-ray structure analysis and the vibrational spectra show that the [P3]7- polyanion is strongly asymmetric with d(P-P) = 2.28 Å and 4.10 Å, corresponding to a [P2]4- dumbbell weakly coupled to a single p3- anion. The tetraphosphidoindate(III) anion [InP4]9- is slightly compressed along the 4 axis, with bond lenght d(In-P) = 2.71 Å. It is shown that the structure is hierarchically related to that of Cu2O, with two interpenetrating frameworks, in which the O and Cu atoms are replaced by condensed [InP4/2] tetrahedron and [BaP4P2/2] octahedra, respectively. Both frameworks are meso configured, containing alternate R and S fragments. The other Ba cations envelop the P6 octahedra and P3 triads forming condensed cubes, tetragonal antiprisms and bicapped trigonal prisms. Therefore, the structure also forms a heterogeneous framework of centred PBa8/2tap tetragonal antiprisms and BaBa8/2cub cubes, consisting of two interpenetrating enantiomorphic nets (R and S) similar to those in the cubic phase RhBi4.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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