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  • 1
    ISSN: 0044-2313
    Keywords: Rare Earths ; Bromides ; Copper ; Synthesis ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of (NH4)3Cu4Ho2Br13. Further Bromides of the (NH4)3Cu4M2Br13 Type (M = Dy—Lu, Y) and on Rb3Cu4Ho2Br13Single crystals of (NH4)3Cu4Ho2Br13 were obtained for the first time from the reaction of CuBr with HoBr3 which was contaminated with NH4Br: cubic, space group Pn3, Z = 2, a = 1101.71(5) pm. The crystal structure may be considered as a variant of the fluorite type according to [(HoBr6)4][(NH4)6(Cu4Br)2] ≡ Ca4F8. Pure products can be prepared from the binary halides in glass ampoules at 350°C. The bromides (NH4)3Cu4M2Br13 (M = Dy—Lu, Y) and Rb3Cu4Ho2Br13 are isotypic with (NH4)3Cu4Ho2Br13.
    Notes: Einkristalle von (NH4)3Cu4Ho2Br13 wurden erstmals bei der Reaktion von CuBr mit HoBr3, das mit NH4Br „verunreinigt“ war, erhalten: kubisch, Raumgruppe Pn3, Z = 2, a = 1101,71(5) pm. Die Kristallstruktur ist gemäß [(HoBr6)4][(NH4)6(Cu4Br)2] ≡ Ca4F8 als eine Variante des Flußspat-Typs aufzufassen. Reine Produkte können aus den binären Halogeniden bei 350°C in Glasampullen dargestellt werden. Die Bromide (NH4)3Cu4M2Br13 (M = Dy—Lu, Y) und Rb3Cu4Ho2Br13 sind mit (NH4)3Cu4Ho2Br13 isotyp.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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