PbSrYCaCuO : a new class of superconducting materials. Chemical analyses refined by Energy Dispersive X-rays

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Abstract
A new class of superconducting material - PbSrYCaCuO - has been recently synthesized. Energy Dispersive X-ray analyses of a sample prepared in our laboratory indicate that 80 % of the matrix is constituted by the Pb 2.25Sr1.95Y0.72Ca0.28Cu2.95O 8.5 compound, 12 % represents random compositions and 8 % corresponds to (Ca, Sr) CuOx compounds. Chemical cartography and maps correlation illustrate such conclusions. Some new electron diffraction data are correlated to these analyses