Bonding and Mossbauer isomer shifts in (Tl, Pb)-1223 cuprate
Data(s) |
2002
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Resumo |
By using the clinical bond theory of dielectric description, the chemical bond parameters of (Tl.Pb) - 1223 was calculated. The results show that the Sr-O, Tl-O, and Ca-O types of bond have higher ionic character and the Cu-O types of bond have more covalent, character. Mossbauer isomer shifts of Fe-57 and Sn-119 doped in (Tl, Pb) -1223 were calculated by using the chemical environmental factor, h, defined by covalency and electronic polarizability. Four valence state tin and three valence iron sites were identified ill Fe-57, and Sn-119 doped (Tl, Pb) -1223 superconductor. We conclude that all of' the Fe atoms substitute the Cu at square planar Cu (H site, whereas Sn prefers to Substitute the square pyramidal Cu (2) site. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Gao FM;Li DC;Wang YZ;Tian YJ;Chen MZ;Zhang SY.Bonding and Mossbauer isomer shifts in (Tl, Pb)-1223 cuprate,CHINESE CHEMICAL LETTERS,2002,13(4):367-370 |
Tipo |
期刊论文 |