Synthesis and structure of Sr1.5Ba0.5CuO2(CO3): An oxycarbonate containing infinite CuO2 layers

A Robert Armstrong, P. P. Edwards

Research output: Contribution to journalComment/debatepeer-review

41 Citations (Scopus)

Abstract

The synthesis and structure of the layered oxycarbonate Sr1.5Ba0.5CuO2(CO)3, is reported here. The structure determined by time-of-flight neutron powder diffraction both at room temperature and at 4 K is tetragonal, space group P4/mmm, with lattice parameters a=3.9281(1)Å and c=7.6045(2)Å (room temperature). The structure of the oxycarbonate is composed of alternating carbonate and (CuO2)x layers separated by layers of alkaline-earth cations; considerable orientational disorder of the carbonate groups was evident even at 4 K. Based on the detailed structural features of the new oxycarbonates, we can now discuss possible limitations on their subsitutional chemistry; these will have important implications in attempts to drive the system metallic—and perhaps superconducting.
Original languageEnglish
Pages (from-to)432-436
Number of pages5
JournalJournal of Solid State Chemistry
Volume98
Issue number2
DOIs
Publication statusPublished - Jun 1992

Keywords

  • CRYSTAL

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