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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 411 (1975), S. 111-117 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure of BaTeO3Crystals of BaTeO3 were prepared from melts. BaTeO3 is isotropic with KClO3 and crystallizes in the monoclinic system, space group P21/m. The lattice parameters are a = 4.633, b = 5.952, c = 7.308 Å, β = 111.2°. The formula unit is 2.The crystal structure was determined by Patterson synthesis, refined by least squares and confirmed by (Fo  -  Fc) synthesis. Using isotropic temperature corrections the R-value of 1072 observed reflections calculated as 0.748, and anisotropic the R-value as 0.702. In BaTeO3 tellurium forms with three oxygen atoms pyramidal TeO3-groups, barium has to oxygen atoms the coordination 7+2. The TeO3 groups are not linked one with another, but with the BaO9 polyhedrons by common corners and edges, the latter are linked one with another only by common edges.
    Notes: Kristalle von BaTeO3 wurden aus Schmelzen hergestellt. BaTeO3 ist isotyp zu KClO3, kristallisiert monoklin, Raumgruppe P21/m, Gitterkonstanten: a = 4,633, b = 5,952, c = 7,308 Å, β = 111,2°, Z = 2. Die Kristallstruktur wurde aus dreidimensionalen Intensitätsdaten durch eine Patterson-Synthese bestimmt, in einer Least square Rechnung verfeinert und in einer (Fo  -  Fc)-Synthese bestätigt. Der R-Wert isotrop betrug 0,748, der R-Wert anisotrop 0,702 für 1072 beobachtete Reflexe.Tellur bildet im BaTeO3 mit drei Sauerstoffatomen pyramidale TeO3-Gruppen, Barium hat die Koordination 7+2. Die TeO3-Gruppen sind untereinander nicht verknüpft und besitzen mit den BaO9-Polyedern gemeinsame Kanten und Ecken, letztere sind untereinander generell kantenverknüpft.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 411 (1975), S. 103-110 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure of Li2TeO3Crystals of Li2TeO3 were prepared from melts. Li2TeO3 crystallizes in the monoclinic system, space group C2/c. The lattice parameters are a = 5.069, b = 9.566, c = 13.727 Å, β = 95.4°. The formular unit is 8. The crystal structure has been determined by Patterson and threedimensional differential Fourier synthesis refined by least squares using isotropic temperature corrections. The final R-value of 772 observed reflections is 0.101.Li2TeO3 forms a layer lattice consisting of trigonal TeO3 pyramids and deformed LiO4 tetrahedrons. The TeO3 pyramids are only connected with the corners of LiO4 groups, which are linked one with another by common corners and edges.
    Notes: Kristalle von Li2TeO3 wurden aus Schmelzen gezogen. Li2TeO3 ist monoklin, Raumgruppe C2/c; Gitterkonstanten: a = 5,069, b = 9,566, c = 13,727 Å, β = 95,4°; Z = 8. Die Struktur wurde aus dreidimensionalen Intensitätsdaten durch Patterson- und (F0  -  Fc)-Synthesen bestimmt sowie durch Least square-Rechnungen verfeinert. Der R-Wert für 772 beobachtete Reflexe beträgt 0,101.Li2TeO3 bildet ein Schichtengitter, bestehend aus verzerrten LiO4-Tetraedern und TeO3-Pyramiden. Die LiO4-Tetraeder besitzen untereinander gemeinsame Ecken und Kanten, sind mit den TeO3-Pyramiden eckenverknüpft, letztere sind untereinander nicht verbunden.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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