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High pressure synthesis and structure of the superconducting mercury cuprates (Hg1-xMx)Ba2Can-1CunO2+2n+delta with M = C, S.

Abstract:

In mercury superconducting cuprates synthesized at high pressure, partial carbon substitution on the mercury site occurs when the precursors are not absolutely carbon free. Hg-12(n-1)n samples made from carbonate-containing precursors show lower Tcs and smaller c parameter. A model of the structural arrangement of the CO3 -2 groups is proposed from neutron diffraction data and crystal-chemistry considerations. The third oxygen of the oxyanion is situated in the (Hg,C)O∂ layer and hinders the ...

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Publication status:
Published

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Volume:
282
Issue:
PART 1
Pages:
65-68
Publication date:
1997-08-05
DOI:
ISSN:
0921-4534
URN:
uuid:2dc73164-2c93-4617-8944-01e5a47f578c
Source identifiers:
66388
Local pid:
pubs:66388

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