Other
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000susct..13.1129t&link_type=abstract
Superconductor Science and Technology, Volume 13, Issue 8, pp. 1129-1134 (2000).
Other
4
Scientific paper
In this experiment we investigated the synthesis of the double mercury layer compound Hg2Ba2YCu2O8-δ (Hg-2212) at 4 GPa and 900 °C by in situ x-ray diffraction performed at the high-pressure ID30 beam line at ESRF. The chemical path observed depends on the choice of the initial mixture. If one starts from a mixture of oxides and copper, an intermediate oxide phase (a high-pressure variety) containing barium and mercury is formed (we do not know if copper is present). This intermediate phase is then converted into the final Hg-2212 product. On the other hand, Hg-2212 grows directly from a pre-reacted precursor `Ba2YCu2Oy' mixed with HgO. This in situ technique clearly shows its efficiency in identifying, in real time, a phase that would have been difficult to observe ex situ.
Bordet Pierre
Capponi J. J.
Lefloch S.
Mezouar Mohamed
Odier Ph.
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