Neutron diffraction of Y-Ba-Cu-O-Cl ceramic
Osip'yan Yu. A. , Bokhenkov E. L.,Golosovskii I. V. , Zharikov O. V. , Krasheninnikov A. V., Kuznetsov S. A., Nikolaev R. K. , Plakhtii V. P., Ponyatovskii E. G., Rashchupkin V. I., Sidorov N. S., Sovestnov A. E. , Fedorova E. I., Kharchenkov V. P.
Three phases, one amorphous and two crystalline, have been observed in two ceramic samples which go superconducting after chlorination. Chlorine atoms go into the unit cell. They statistically replace oxygen atoms and do not occupy vacant sites, as oxygen does.