Synthesis, Structure and Properties of a New Molybdate-tellurite Compound with 2D Triangular Lattice  

作　　者：XIE Ya-Xin ZHANG Wan-Wan ZHAO Zhi-Ying HE Zhang-Zhen 谢雅新;张万万;赵志颖;何长振(State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Journal of Structural Chemistry》2021年第1期96-102,4,共8页结构化学（英文）

基　　金：financially supported by the National Natural Science Foundation of China(NSFC,Nos.21573235,U1632159 and 21875249)。

摘　　要：A new 3 d transition-metal molybdate-tellurite(NH4)2 Co(TeMo2O9)2 was obtained through a conventional hydrothermal method.This compound was confirmed to crystallize in the monoclinic system of space group P2_(1)/c with a=10.5133(5),b=10.6456(5),c=7.6078(5)Å,β=108.879(6)o,V=805.66(8)Å^(3),Z=2,M_(r)=1021.97,Dc=4.213 g/cm^(3),μ=7.685 mm^(–1),F(000)=930,the final R=0.0399 and w R=0.1025 for 1580 observed reflections with I>2σ(I),showing a tunnel structure with spin triangle-lattice composed by CoO_(6) octahedra.Magnetic and heat capacity measurements confirmed a paramagnetic behavior down to 2 K with a negative Weiss temperature of–20 K,suggesting remarkable spin frustration in the system.

关 键 词：molybdate-tellurite triangular spin-lattice crystal structure magnetic properties 

分 类 号：O641.3[理学—物理化学]