Synthesis and crystal structure of a new alkaline-earth metal chalcogenide: Barium ditelluride

• Published in: Materials research bulletin Vol. 29; no. 10; pp. 1041 - 1048
• Main Authors: Li, Jing, Guo, Hong-You, Carey, James R., Mulley, Suzanne, Proserpio, Davide M., Sironi, Angelo
• Format: Journal Article
• Language: English
• Published: London Elsevier Ltd 01.10.1994; Amsterdam Elsevier Science
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Halides, chalcogenides and analogous compounds of group vb; Inorganic compounds; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; X-ray absorption spectroscopy: exafs, nexafs, xanes, etc; X-ray diffraction and scattering; tellurium; barium; chalcogenide; telluride; Tellurides; Inorganic compounds; Flux growth; Barium compounds; Barium Tellurides; Binary compounds; XRD; Experimental study; Zintl phases; Crystal structure
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/0025-5408(94)90085-X

During our exploration of kinetically stable solid state materials, we have discovered a new binary material, BaTe 2, the first alkaline earth metal dichalcogenide prepared using flux growth technique. The crystal structure of BaTe 2 was determined by single-crystal X-ray diffraction methods. It belongs to the tetragonal space group I4/mcm (No. 140) with lattice constants a = 7.181(1) A ̊ , c = 8.898(2) A ̊ , V = 458.8(1) A ̊ 3 and Z=4. The final residual index is converged to R=1.5%, wR2=3.5%. BaTe 2 is a Zintl type compound isostructural to SrS 2. Pairs of tellurium atoms form dimeric units (Te 2) 2− with a Te-Te separation of 2.7722(8) Å. The synthesis of BaTe 2 at relatively low temperature has provided an alternative and convenient route for preparing new compounds in this category.