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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 501 (1983), S. 102-110 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Fluororhodates(III): On the Knowledge of Pb2RhF7 and Sr2RhF7New prepared are Pb2RhF7 and Sr2RhF7 (light carmine red resp. ochreous powders). Single crystals of Pb2RhF7 show monoclinic lattice constants: a = 5.569, b = 11.854, c = 8.832 Å. β = 91.00°, Z = 4, space group P21/c. Inspite of similar cell parameters the structure of Pb2RhF7 (4-circle diffractometer, MoKα, 2257 unique reflections, Rw = 8.1%) is different from K2NbF7. According to Pb2F[RhF6] one F- is coordinated to 3 Pb2+ only, while the other 6 F- form the distorted octahedron [RhF6]. Details of the structure are discussed using the Madelung Part of Lattice Energy, MAPLE, and Effective Coordination Numbers, ECoN. Sr2RhF7 is isotypic: a = 5.519, b = 11.668 c = 8.635 Å, β = 90.94°. Lattice constants for Sr2ScF7, Sr2InF7 and Ba2TlF7 are given.
    Notes: Neu dargestellt wurden Pb2RhF7 und Sr2RhF7 in Form hellkarminroter bzw. ockerfarbener Pulver. Dunkelkarminrote Einkristalle von Pb2RhF7 kristallisieren monoklin mit a = 5,569, b = 11,854, c = 8,832 Å und β = 91,00°, Z = 4 in P21/c.Trotz ähnlicher Elementarzellenabmessungen ergab die Strukturbestimmung (Vierkreisdiffraktometer, MoKα, 2257 hkl, Rw = 8,1%) keine Isotypie mit K2NbF7. Vielmehr liegen entsprechend Pb2F[RhF6] verzerrt oktaedrische Baugruppen [RhF6] neben nur von drei Pb2+ koordinierten F- vor. Einzelheiten der Struktur werden unter Verwendung des Madelunganteils der Gitterenergie, MAPLE, und Effektiver Koordinationszahlen, ECoN, diskutiert.Sr2RhF7 ist isotyp: a = 5,519, b = 11,668, c = 8,635 Å, β = 90,94°. Erstmals werden Gitterkonstanten für Sr2ScF7, Sr2InF7 und Ba2TlF7 angegeben.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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