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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 573 (1989), S. 133-142 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Oxotellurates(VI) of the Alkali Metals. Existence and Constitution of Li6TeO6For the first time Li6TeO6 is prepared as transparent, colourless single crystals, and the structure has been determined [four-circle diffractometer data, Siemens AED2, MoKα, 371 out of 371 IO(hkl), R = RW = 0.7%, R3, a = 791.99(6) pm, c = 696.44(7) pm, Z = 3].The structure refinement shows that Li6TeO6 is a variant of the NaCl-Typ. Nevertheless there is a relationship with α-Li6UO6 [2]. The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, the latter derived from Mean Effective Fictive Ionic Radii, MEFIR, are calculated and discussed.
    Notes: Erstmals wurden klar durchscheinende, farblose Einkristalle von Li6TeO6 dargestellt und strukturell untersucht. [Vierkreisdiffraktometerdaten, Siemens AED2, MoKα-Strahlung, 371 von 371 IO(hkl), R = RW = 0,7%, R3, a = 791,99(6) pm, c = 696,44(7) pm, Z = 3].Die Strukturbestimmung zeigt, daß Li6TeO6 eine Variante des NaCl-Typs ist. Dennoch besteht Verwandtschaft mit α-Li6UO6 [2]. Der Madelunganteil der Gitterenergie, MAPLE, sowie Effektive Koordinationszahlen, ECoN, diese über Mittlere Effektive Ionenradien, MEFIR, werden berechnet und diskutiert.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 584 (1990), S. 105-113 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A New Type of Oxotellurates (VI): Rb6[TeO5] [TeO4]For the first time single crystals of Rb6Te2O9 was obtained by annealing intimate mixtures of the binary oxides (closed Ag-cylinder in supremax-glass ampoule, 680°C, 45 d). The structure elucidation (four-circle diffractometer, AgKα, 2083 I0(hkl); R = 9.5%, Rw = 6.6%) confirms the space group C2/c with a = 1207.5(7), b = 1266.3(5), c = 1105.3(6) pm, β = 123.1(1)0, Z = 4 (Guinier-Simon photographs).Characteristic for this structure are „isolated“ trigonal bipyramidal groups of [TeO5] and „isolated“ tetrahedral groups of [TeO4], so we prefere to name the new compound Rb6[TeO5][TeO4]. The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, the latter derived from Mean Fictive Ionic Radii, MEFIR, are calculated and discussed.
    Notes: Neu dargestellt wurde erstmals Rb6Te2O9 durch Erhitzen inniger Gemenge der binären Oxide in Form farbloser, unregelmäßiger Einkristalle (geschlossene Ag-Bömbchen in Supremaxampullen, 680°C, 45 d).Die Strukturaufklärung (Vierkreisdiffraktometerdaten; AgKα; 2083 I0(hkl); R = 9,5%, Rw = 6.6%) belegt die Raumgruppe C2/c. Aus Guinier-Simon-Aufnahmen folgt a = 1207,5(7), b = 1266,3(5), c = 1105,3(6) pm, β = 123,1(1)0, Z = 4.Strukturcharakteristisch sind „isolierte“ trigonal-bipyramidale Gruppen [TeO5] und „isolierte“ tetraedrische Gruppen [TeO4], was die Bezeichnung Rb6[TeO5][TeO4] richtiger erscheinen läßt. Der Madelunganteil der Gitterenergie, MAPLE, sowie Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, werden berechnet und diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 586 (1990), S. 125-135 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The First Quinquinary Oxotellurate (VI): K3Na2LiTeO6Colourless single crystals of K3Na2LiTeO6 are formed by reaction of the binary oxides (closed Ag-cylinder in supremaxglass ampoule; K2O:Na2O:Li2O:TeO3 = 3:2:1:2; 720°C; 40 d). The structure elucidation (four-circle diffractometer, MoKα, 3286 symmetry independent I0(hkl); R = 1.9%) confirms the space group Cc with a = 928.3(1), b = 1187.4(2), c = 678.7(1) pm, β = 93.8(1)°, Z = 4 (Guinier-deWolff-data).Essential part of the structure are chains ∞1{LiTeO6} which are connected to sheets ∞2{Na2LiTeO6}by sodium.The Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN, the latter derived from Mean Fictive Ionic Radii, MEFIR, are calculated and discussed.
    Notes: Neu dargestellt wurde aus den binären Oxiden in Form farbloser, kugeliger Einkristalle K3Na2LiTeO6 (geschlossene Ag-Bömbchen in Supremaxampullen; K2O:Na2O:Li2O:TeO3 = 3:2:1:2; 720°C; 40 d).Die Strukturaufklärung (Vierkreisdiffraktometerdaten; MoKα, 3286 I0(hkl), alle verwendet; R = 1,9%), belegt die Raumgruppe Cc. Aus Guinier-deWolff-Daten folgt a = 928,3(1), b = 1187,4(2), c = 678,7(1) pm, β = 93,8(1)°, Z = 4.Charakteristisch für die Struktur sind aus [TeO6]-Oktaeder und tetraedrischen [LiO4]-Gruppen gebildete Ketten ∞1{LiTeO6}, die über Na+zu Schichten ∞2{Na2LiTeO6} verknüpft sind.Der Madelunganteil der Gitterenergie, MAPLE, sowie Effektive Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, werden berechnet und diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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