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VOLUME 62 (1995) | ISSUE 6 | PAGE 491
High-pressure synthesis of an x-ray diffraction in the single-phase superconducting mercury cuprate HgBa2Ca3Cu4O10+x
It is shown that a controllable high-pressure chamber can be used to obtain higher single-phase homologs of the high-Γ,. mercury cuprates. The single-phase superconducting ceramics HgBa2Ca3Cu4O10+A are synthesized and corroborating x-ray diffraction data are presented. The synthesis parameters, the temperature, and the holding time are substantially different from the published values. It is shown that the next terms in the homological series can be obtained by using higher synthesis temperatures and longer holding times. © 7995 American Institute of Physics.