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  • 1
    ISSN: 0044-2313
    Keywords: Strontium, europium, beryllium, oxide ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Eu3+ and Eu2+ in Oxides of the Composition MBeLn2O5: SrBeEu2O5 and EuBeNd2O5Single crystals of (I): SrBeEu2O5 and (II): EuBeNd2O5 were prepared by CO2-LASER (I) in air and plasma torch (II) technique in H2 atmosphere. X-ray investigations led to orthorhombic symmetry, space group D2h16-Pnma; (I): a = 9.488, b = 7.156, c = 6.495 Å; (II): a = 9.534, b = 7.225, c = 6.544 Å, Z = 4. Sr2+ and Eu3+ as well as Eu2+ and Nd3+ are in statistical distribution within a Kagomé framework. Both compounds are discussed with respect to the monoclinic form of MBeLn2O5.
    Notes: Einkristalle von (I): SrBeEu2O5 und (II): EuBeNd2O5 wurden mit CO2-LASER- bzw. Plasmabrennertechnik an Luft bzw. unter H2-Atmosphäre dargestellt. Die röntgenographische Untersuchung führte zu orthorhombischer Symmetrie, Raumgruppe D2h16-Pnma, mit (I): a = 9,488, b = 7,156, c = 6,495 Å; (II): a = 9,534, b = 7,225, c = 6,544 Å, Z = 4. Sr2+ und Eu3+ sowie Eu2+ und Nd3+ besetzen in einem Kagomégerüst die Metallpositionen statistisch. Beide Verbindungen werden mit Blick auf die monokline Form von MBeLn2O5 diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0044-2313
    Keywords: Potassium ; Barium ; Cadmium ; Vanadium Oxide ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On an Alkali Alkaline-Earth Cadmium Oxovanadate: KBaCd2(VO4)(V2O7)Single crystals of KBaCd2(VO4)(V2O7) have been prepared by crystallization from melts. X-ray investigations led to monoclinic symmetry, space group C2h5—P21/n, a = 10.359(3), b = 6.986(2), c = 15.331(3) Å, β = 94.77(2), Z = 4. The hitherto unknown compound represents a new structure type and is one of those few examples containing VO4 and V2O7 groups.
    Notes: Einkristalle von KBaCd2(VO4)(V2O7) wurden durch Kristallisation aus der Schmelze erhalten. Röntgenographische Untersuchungen führten zu monokliner Symmetrie, Raumgruppe C2h5 — P21/n, mit a = 10,359(3), b = 6,986(2), c = 15,331(3), β = 94,77(2)°, Z = 4. Die bisher unbekannte Substanz vertritt einen neuen Strukturtyp und ist eines der wenigen Beispiele mit VO4- und V2O7-Baugruppen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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