Die Kristallstrukturen der Hydroxyhalogenide Li4(OH)3Br und Li4(OH)3I
Abstract
deMit Hilfe von Einkristall- und Röntgenpulverdaten wurden die Kristallstrukturen der Hydroxyhalogenide Li4(OH)3Br und Li4(OH)3I aufgeklärt. Li4(OH)3Br kristallisiert in der Raumgruppe P21/m und ist isotyp zum leichteren Homologen Li4(OH)3Cl (Rietveld-Verfeinerung; T = 293 K; a = 545, 41(1); b = 758, 13(1); c = 650, 20(1) pm; β = 93, 82(1)°; Z = 2; 300 unabhängige Reflexe; Rp = 0, 106; Rwp = 0, 109; Rexp = 0, 081).
Li4(OH)3I kristallisiert in der Raumgruppe Pmmn in einer Variante der LiOH Struktur, in der 1/4 der Hydroxid- durch Iodid-Anionen ausgetauscht sind (Einkristallstrukturanalyse; T = 100 K; a = 1029, 5(4); b = 525, 9(2); c = 573, 2(2) pm; Z = 2; 392 unabhängige Reflexe; R1 = 0, 0642).
Abstract
enThe Crystal Structures of the Lithium Hydroxide Halides Li4(OH)3Br and Li4(OH)3I
Using single crystal analysis and powder diffraction data the crystal structures of the lithium hydroxide halides Li4(OH)3Br and Li4(OH)3I were solved and refined. Li4(OH)3Br crystallises in the space group P21/m and is isotypic with the lighter homologue Li4(OH)3Cl. (Rietveld-refinement; T = 293 K; a = 545, 41(1); b = 758, 13(1); c = 650, 20(1) pm; β = 93, 82(1)°; Z = 2; 300 unique reflections; Rp = 0, 106; Rwp = 0, 109; Rexp = 0, 081).
Li4(OH)3I crystallises in the space group Pmmn in a variant of the LiOH structure in which 1/4 of the hydroxide anions are replaced by iodide anions. (Single crystal analysis; T = 100 K; a = 1029, 5(4); b = 525, 9(2); c = 573, 2(2) pm; Z = 2; 392 unique reflections; R1 = 0, 0642).
