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Modification of the chain structure of liquid chalcogen by adding halogens and alkalis

1993; Elsevier BV; Volume: 156-158; Linguagem: Inglês

10.1016/0022-3093(93)90063-4

1873-4812

Y. Kawakita, Jun Dong, Takuya Tsuzuki, Yoshinori Ohmasa, M. Yao, Hidenori Endo, H. Hoshino, Masanori Inui,

Crystal Structures and Properties

Abstract The authors studied how the chain structure of liquid Te is modified by adding halogen or alkali atoms. EXAFS measurements have been carried out using synchrotron radiation. Liquid Te has a two foldcoordinated structure with longer and shorter covalent bonds. By addition of Na and K, the length of the longer bond is considerably reduced, suggesting a structural modification of the Te zigzag chain. If Rb is added, the difference in length of the longer and shorter bonds is relatively large compared with the Na and K cases. For the liquid Te mixture containing 20 at.%Cl, only one TeTe bond can be recognized within the chain.