Assignment of the Powder X-Ray Diffraction Pattern of Superconductor Bi₂(Sr, Ca)_3-xCu₂O_y

Abstract

The powder X-ray diffraction pattern of superconductor Bi 2 (Sr, Ca) 3- x Cu 2 O y was assigned taking into account the satellite reflections arising from an incommensurate modulated structure. All reflections are indexable with h a * + k b * + l c * + m k, provided that the wave vector k of the modulated structure is b * /4.8. The result shows that many satellites can be observed and some satellite intensities are strong.