Synthesis, crystal structure and magnetism of the new oxysulfide Ce3NbO4S3

Altmannshofer S; Johrendt D

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Synthesis, crystal structure and magnetism of the new oxysulfide Ce3NbO4S3

机译：新型氧硫化铈Ce3NbO4S3的合成，晶体结构和磁性

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The orange cerium-niobium-oxysulfide Ce3NbO4S3 was synthesized by the solid state reaction of CeO2, Ce-metal, Nb2O5 and sulfur at 1100 degrees C. The crystal structure has orthorhombic symmetry (space group Pbam, a = 7.055(1), b = 14.571(3), c = 7.627(2) angstrom, Z = 4) and contains isolated [Nb2S4O6](10-) ions consisting of two strongly distorted, edge sharing NbO3SS2/2 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)(infinity)[(Ce6S2O2)(10+)] polycations perpendicular to the c-axis. The magnetic susceptibility shows Curie-Weiss behavior with an effective magnetic moment mu(eff) = 2.63(1) mu(B)/Ce in agreement with Ce3+. A Weiss-constant theta(p) = 12(1) K indicates weak antiferromagnetic coupling. No magnetic ordering was detected above 2 K.

机译：通过CeO2，Ce-金属，Nb2O5和硫在1100摄氏度下的固相反应合成橙色铈-铌-氧硫化物Ce3NbO4S3。晶体结构具有正交晶对称性（空间群Pbam，a = 7.055（1），b = 14.571（3），c = 7.627（2）埃，Z = 4），并包含由两个严重扭曲的，边缘共享的NbO3SS2 / 2八面体组成的[Nb2S4O6]（10-）离子。铌与三个氧和三个硫原子相连。铈原子被氧和硫原子配位八倍。某些氧和硫原子未与铌连接，但仅被铈包围。通过连接这些阳离子多面体，可以识别垂直于c轴的（2）（无限）[（Ce6S2O2）（10+）]聚阳离子层。磁化率显示居里-魏斯行为，与Ce3 +一致，有效磁矩mu（eff）= 2.63（1）mu（B）/ Ce。 Weiss常数theta（p）= 12（1）K表示弱反铁磁耦合。在2 K以上未检测到磁性排序。

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《Zeitschrift fur Anorganische und Allgemeine Chemie》 |2008年第8期|共4页
作者
Altmannshofer S; Johrendt D;
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正文语种 eng
中图分类化学;
关键词
oxysulfides; cerium; niobium; crystal structure; magnetism; ND; OXYCHALCOGENIDES; SM; LN; COMPOUND; SERIES;

机译：氧硫化物;铈;铌;晶体结构;磁性;ND;氧合碳酸盐;SM;LN;化合物;系列;

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Synthesis, crystal structure and magnetism of the new oxysulfide Ce3NbO4S3

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