Premium
Röntgenstrukturanalysen an Einkristallen von Ce 2 S 3 im A‐ und C‐Typ
Author(s) -
Schleid Thomas,
Lauxmann Petra
Publication year - 1999
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/(sici)1521-3749(199907)625:7<1053::aid-zaac1053>3.0.co;2-z
Subject(s) - orthorhombic crystal system , crystallography , dodecahedron , trigonal crystal system , sulfur , chemistry , molar ratio , monoclinic crystal system , cerium , crystal structure , materials science , inorganic chemistry , biochemistry , catalysis , organic chemistry
X‐Ray Structure Analyses for Single Crystals of A‐ and C‐type Ce 2 S 3 Dark red, lath‐shaped single crystals of A‐type Ce 2 S 3 (orthorhombic, Pnma, a = 753.23(6), b = 409.67(3), c = 1572.76(9) pm, V m = 73.065(8) cm 3 /mol, Z = 4) are obtained along with deep red, bead‐shaped single crystals of C‐type Ce 2 S 3 (cubic, I 4 3d, a = 865.24(5) pm, V m = 73.140(7) cm 3 /mol, Z = 5.333) and cinnabar (α‐HgS) during unsuccessful efforts to synthesize HgCe 2 S 4 by the oxidation of mercury and cerium metal with sulfur (molar ratio 1 : 2 : 4) in evacuated silica tubes at 400 °C in the presence of a fluxing KCl–LiCl mixture within seven days. Their crystal structures belong to the α‐Gd 2 S 3 ‐ (A type) or a cation‐deficient Th 3 P 4 ‐type family (C type) according to M 2.667 □ 0.333 S 4 (Z = 4) or M 2 S 3 (Z = 5.333), respectively, offering coordination numbers of seven and eight (S 2– arranged as mono‐ or bicapped trigonal prisms in A‐Ce 2 S 3 ) or eight only (S 2– arranged as trigonal dodecahedra in C‐Ce 2 S 3 ) to the Ce 3+ cations.