High-temperature superconductivity

The following sixteen reference patterns of boride, silicide, nitride, and oxide ceramics represent the second group of reference patterns of ceramic phases measured at the National Bureau of Standards under the project "High Quality Reference Patterns and Total Digital Powder Patterns of Technologically Important Ceramic Phases." Included in the sixteen reference patterns are reports for two high T c superconducting oxide phases (CuLa, g Sr 0 2 0 4 and BajQLjYO,) plus one related phase (BaCuY 2 0 5 ). In addition to these new phases, five other patterns represent phases previously not contained in the PDF and eight represent major corrections to data in the file. The general methods of producing these X-ray powder diffraction reference patterns are described in this