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Phase Equilibria of the SrO-Yb2O3-CuOx System in Air



J Dillingham, Winnie Wong-Ng, Igor Levin


The phase diagram of the SrO-Yb2O3-CuOx system was investigated in air. The solid solution (Sr14-xYbx)Cu24Oz (O13Yb)Cu24Oz indicated that this phase is incommensurate, with the modulation wave vector q=(1/2-z)c*, znearly equal to}0.066. The Sr-analogs of the Ba2YbCu3O6+x high Tc superconductor and the associated BaYb2CuO5 'green phase' were not observed in this system. The ionic size of lanthanides 'R' in the SrO-R2O3-CuOx systems affects the number of compounds formed and their crystal chemistry. The phase diagrams exhibit a smaller number of solid solution phases with decreasing size of R-cations, reflecting the lanthanide contraction.
International Journal of Inorganic Materials
No. 6


crystal chemistry, phase equilibria, SrO-Yb<sub>2</sub>O<sub>3</sub>-CuO<sub>x</sub>, TEM study of (Sr, Yb)<sub>14</sub>Cu<sub>24</sub>O<sub>41</sub>, x-ray diffraction


Dillingham, J. , Wong-Ng, W. and Levin, I. (2001), Phase Equilibria of the SrO-Yb<sub>2</sub>O<sub>3</sub>-CuO<sub>x</sub> System in Air, International Journal of Inorganic Materials (Accessed April 17, 2024)
Created August 31, 2001, Updated October 12, 2021