Premium
Synthesis, Crystal Structure and Magnetism of the New Oxysulfide Ce 3 NbO 4 S 3
Author(s) -
Altmannshofer Sandra,
Johrendt Dirk
Publication year - 2008
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.200800078
Subject(s) - crystallography , orthorhombic crystal system , octahedron , crystal structure , magnetic moment , antiferromagnetism , niobium , chemistry , magnetism , magnetic susceptibility , cerium , inorganic chemistry , materials science , condensed matter physics , physics , organic chemistry
The orange cerium‐niobium‐oxysulfide Ce 3 NbO 4 S 3 was synthesized by the solid state reaction of CeO 2 , Ce‐metal, Nb 2 O 5 and sulfur at 1100 °C. The crystal structure has orthorhombic symmetry (space group Pbam , a = 7.055(1), b = 14.571(3), c = 7.627(2) Å, Z = 4) and contains isolated [Nb 2 S 4 O 6 ] 10− ions consisting of two strongly distorted, edge sharing NbO 3 SS 2/2 octahedra. Niobium is connected to three oxygen and three sulfur atoms. The cerium atoms are eightfold coordinated by oxygen and sulfur atoms. Certain oxygen and sulfur atoms are not connected to niobium, but exclusively surrounded by cerium. By connecting these cation polyhedra, one recognizes layers of $^{2}_{\infty}\rm [(Ce_{6}S_{2}O_{2})^{10+}]$ polycations perpendicular to the c ‐axis. The magnetic susceptibility shows Curie‐Weiss behavior with an effective magnetic moment μ eff = 2.63(1) μ B /Ce in agreement with Ce 3+ . A Weiss‐constant θ p = –12(1) K indicates weak antiferromagnetic coupling. No magnetic ordering was detected above 2 K.