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  • 1
    ISSN: 0044-2313
    Keywords: System lithium hydroxide/lithium iodide ; crystal structure of Li2I(OH) and Li5I(OH)4 ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Li2I(OH): A Compound with Onedimensional Infinite Edge Sharing [Li4/2(OH)+] PyramidsThe pseudobinary system LiOH/LiI was investigated by X-ray methods. Two compounds, Li2I(OH) and Li5I(OH)4 exist. The structure of Li2I(OH) was solved by single-crystal data. For Li5I(OH)4 lattice constants and space group symmetry are given:Li2I(OH): Pnma, Z = 4, a = 10.339(4) Å, b = 5.567(1) Å, c = 6.643(2) Å, Z(Fo) mit (Fo)2 ≧ 3σ(Fo)2 = 439, Z (parameter) = 23, R/Rw = 0.030/0.040Li5I(OH)4: Pmmn or P21mn(= Pmn21), Z = 2, a = 10.42 Å, b = 5.30 Å, c = 5.81 ÅLi2I(OH) crystallizes in a new type of structure. The motif of a distorted hexagonal close-packed arrangement of iodide ions is penetrated by chains of ∞1[Li4/2(OH)+].
    Notes: Das pseudobinäre System LiOH/LiI wurde röntgenographisch untersucht. Es gibt zwei Verbindungen, Li2I(OH) und Li5I(OH)4. Die Struktur von Li2I(OH) wurde mittels Einkristallröntgenstrukturanalyse aufgeklärt, von Li5I(OH)4 konnte die Elementarzellmetrik und Symmetrie ermittelt werden:Li2I(OH): Pnma, Z = 4, a = 10,339(4) Å, b = 5,567(1) Å, c = 6,643(2) Å, Z(Fo) mit (Fo)2 ≧ 3σ(Fo)2 = 439, Z (Parameter) = 23, R/Rw = 0,030/0,040Li5I(OH)4: Pmmn oder P21mn(= Pmn21), Z = 2, a = 10,42 Å, b = 5,30 Å, c = 5,81 ÅLi2I(OH) kristallisiert in einem eigenen Strukturtyp, dem das Motiv einer verzerrten hexagonal dichtesten Anordnung von Iodidionen zugrunde liegt, die von Strängen aus ∞1[Li4/2(OH)+] durchdrungen wird.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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