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Fused Stars and Nano‐Stripes in the Rare Earth Halide La 7 Sb 11 Br 4
Author(s) -
Zheng Chong,
Mattausch Hansjürgen,
Li Shoujian
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200400306
Subject(s) - intermetallic , halide , crystallography , stars , paramagnetism , trigonal crystal system , lattice (music) , chemistry , metal , rare earth , materials science , crystal structure , physics , condensed matter physics , inorganic chemistry , mineralogy , metallurgy , astrophysics , alloy , acoustics
Abstract The title compound was synthesized from La, LaBr 3 and Sb under Ar atmosphere at 950 °C. It crystallizes in the space group Pnma (No. 62) with lattice parameters a = 30.949(6), b = 4.3042(9), c = 19.675(4) Å and Z = 4. Its structure consists of reduced rare earth halide and intermetallic components. These partial structures are the [La 8 Br 8 ] ∞ elongated octagon stars, Sb‐centered [La 3 Sb] ∞ trigonal prismatic columns and stripes of Sb square meshes up to 2.9 nm wide. Computational analysis shows that title compound has one framework electron per formula in the La metal trigonal prisms but otherwise is electron‐deficient in the intermetallic part. Susceptibility measurement revealed temperature‐independent Pauli paramagnetism.