Synthesis and characterization of mercury-based {open_quotes}1222{close_quotes} cuprates (Hg{sub 1-x}M{sub x})(Sr,Ba){sub 2}Pr{sub 2}Cu{sub 2}O{sub 9-{delta}} (M = Pr, Pb, Bi, Tl)
- Universite de Caen (France)
- Univ. of Antwerp (Belgium)
Five new layered cuprates, with a 1222-type structure, have been synthesized according to the formula (Hg{sub 1-x}M{sub x})(Sr,Ba){sub 2}Pr{sub 2}Cu{sub 2}O{sub 9-{delta}} with M = Pr, Pb, Bi, and Tl. They crystallize in a tetragonal cell with a {approx} a{sub p} and c {approx} 29.5 {angstrom}; their structure consists in a triple intergrowth of oxygen-deficient perovskite, rock-salt- and fluorite-type layers. They are characterized by a mixed [Hg{sub 1-x}M{sub x}O{sub 1-{delta}}] layer in the rock-salt-type slice. The ED and HREM studies show that Tl, Bi, and Pb are statistically distributed in the mixed [Hg{sub 1-x}M{sub x}O{sub 1-{delta}}] layer, contrary to Pr which involves an ordering phenomenon along a. Different stacking defects are observed and discussed as well as the cleavage mode of the crystals.
- OSTI ID:
- 75777
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 115; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ordering principles and defect structure of {open_quotes}1201,{close_quotes} {open_quotes}1212,{close_quotes} and {open_quotes}1222{close_quotes} type (Hg, Pr)-Sr-(Sr,Ca,Pr)-Cu-O superconductors
Pb[sub 1-x]Sr[sub 4]Fe[sub 2]O[sub 9-[delta]]: A layered iron oxide intergrowth of 1201- and 0201-type structures