Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (06): 508-513.doi: 10.3866/PKU.WHXB19940606

• ARTICLE • Previous Articles     Next Articles

Synthesis and Crystal Structure of a New Metal-rich Layered Ternary Tantalum Telluride TaNi2Te2

Zhang Bin, Wang Zhe-Min, Liu Shi-Xiong, Huang Jin-Ling   

  1. Research Center of Solid State Mterial, Fuzhou University, Fuzhou 350002
  • Received:1992-12-03 Revised:1993-05-01 Published:1994-06-15
  • Contact: Liu Shi-Xiong

Abstract:

The title compound has been synthesised by high-temperature solid state reaction. The crystal structure was determined by single crystal X-ray diffraction method. The crystal belongs to orthorhombic system with space group Pnma, Z=4, α=0.6480(1), b=0.35639(6), c=1.6994(4) nm, V=0.3925(1) nm, D_c=9.37 g·cm~(-3), λ(MoK_α)=0.071069 nm, μ(MoK_α)=514.43 cm~(-1) and F(000)=932. The final R is 0.051 for 706 observations. TaNi_2Te_2 is a new metal-rich layered ternary telluride. In the structure two metal sheets are sandwiched below and above by Te layers, leading to planar trigonal coordination for Ta and trigonal pyramidic coordination for Ni by Te atoms. An important structural character of this compound is that all planar five-member TeNi_4 rings are fused together to form an extended structure, and each Ta atom is sandwiched by two TeNi_4 rings.

Key words: Ternary layered telluride, Crystal structure, Synthesis