Abstract

Abstract A model is proposed for the superstructure of Bi 2 Sr 2 CaCu 2 O 8.2 . It involves the addition of one in ten oxygen atoms in the BiO planes and a displacement of the surrounding atoms. This model is consistent with electron microscope, neutron and X-ray diffraction data. In particular it is consistent with the symmetry determined by convergent beam electron diffraction and with details of the high resolution electron microscope image contrast.

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