The Structure of Na3SbTe3: How Ionic and Covalent Bonding Forces Work Together
✍ Scribed by Jianhua Lin; Gordon J. Miller
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 371 KB
- Volume
- 113
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
The compound (\mathrm{Na}{3} \mathrm{SbTe}{3}) has been synthesized from the elements and characterized by single crystal X-ray diffraction. (\mathrm{Na}{3} \mathrm{SbTe}{3}) is cubic, crystallizing in the cP28 structure type (isomorphous with (\mathrm{Na}{3} \mathrm{ASS}{3}) ); space group (P 2,3) (No. 198); (a=9.6114(9)) (R 1=0.0324 ; w R 2=0.0561(I \geq 2 \sigma(I))). The structure consists of isolated sodium cations and trigonal pyramidal (\left[\mathrm{SbTe}{3}\right]^{-3}) anions with a Sb-Te bond length of 2.787 (1) (\AA) and a Te-Sb-Te bond angle of (100.0(1)^{\circ}). The structure is related to both the (\mathrm{Li}{3} \mathrm{Bi}) and (\mathrm{K}{3} \mathrm{AsS}{4})-type structures. Both lattice energy and semiempirical electronic structure calculations are utilized to evaluate various local and long-range structural aspects of this Zintl phase. 1994 Academic Pres, Inc.