Crystal Structure of the High-Tc Phase in the Pb-Bi-Sr-Ca-Cu-O System
- 1 May 1989
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 28 (5A) , L787
- https://doi.org/10.1143/jjap.28.l787
Abstract
The crystal structure of the high-T c phase (T c∼107 K) in the Pb-Bi-Sr-Ca-Cu-O system has been analysed by the Rietveld method on the basis of the X-ray powder diffraction data. The crystal structure belongs to the space group Bbmb and its lattice parameters are a=5.407(6) Å, b=5.407(6) Å and c=37.051(7) Å. The crystal structure is quite similar to that of the high-T c phase (T c∼125 K) of Tl2Ba2Ca2Cu3O10. A flat Cu-O plane and two zigzag Cu-O planes are sandwiched between two Bi-O planes in the crystal structure. It was found that Pb atoms occupy the Bi, Sr and Ca sites by 9%, 7% and 3%, respectively.Keywords
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