Substitution of [open quotes]CO[sub 3][close quotes] groups for copper in YBCO: The oxycarbonates Y[sub n]Ba[sub 2n]Cu[sub 3n[minus]1]Co[sub 3]O[sub 7n[minus]3]
Journal Article
·
· Chemistry of Materials; (United States)
- Universite de Caen (France)
The substitution of carbonate groups for copper in the oxide YBa[sub 2]Cu[sub 3]O[sub 7] has been studied by HREM. Two new phases, members of the series Y[sub n]Ba[sub 2n]Cu[sub 3n[minus]1]CO[sub 3]O[sub 7n[minus]3] have been evidenced for n = 2 and 3, respectively. The corresponding superstructures [open quotes]2a[sub 123] [times] b[sub 123] [times] 2c[sub 123][close quotes] and [open quotes]3a[sub 123] [times] b[sub 123] [times] 2c[sub 123][close quotes] correspond to the ordered substitution of one row of CO[sub 3] groups for one row of CuO[sub 4] groups out of two and three, respectively. The existence of 90[degrees]-oriented domains and of chemical twinning is also shown and the role of CO[sub 3] groups at the domain boundaries discussed. 7 refs., 5 figs.
- OSTI ID:
- 5091605
- Journal Information:
- Chemistry of Materials; (United States), Journal Name: Chemistry of Materials; (United States) Vol. 5:11; ISSN CMATEX; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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New extended defects in the superconductive [open quotes]123[close quotes] oxycarbonitrate YCaBa[sub 4]Cu[sub 5](NO[sub 3])[sub x](CO[sub 3])[sub 1[minus]x]O[sub 11]: HREM study
The oxycarbonate Y[sub 1. 6]Ca[sub 0. 4]Ba[sub 4]Cu[sub 5]CO[sub 3]O[sub 11], n = 2 member of the [open quotes]123[close quotes]-type derivatives (Y[sub 1[minus]x]Ca[sub x])[sub n]Ba[sub 2n]Cu[sub 3n[minus]1]CO[sub 3]O[sub 7n[minus]3]
The substitution of CO[sub 3] groups for copper in Y[sub 1[minus]x]Ca[sub x]Ba[sub 2]Cu[sub 3]O[sub 7]: HREM study
Journal Article
·
Sun Aug 01 00:00:00 EDT 1993
· Chemistry of Materials; (United States)
·
OSTI ID:7207492
The oxycarbonate Y[sub 1. 6]Ca[sub 0. 4]Ba[sub 4]Cu[sub 5]CO[sub 3]O[sub 11], n = 2 member of the [open quotes]123[close quotes]-type derivatives (Y[sub 1[minus]x]Ca[sub x])[sub n]Ba[sub 2n]Cu[sub 3n[minus]1]CO[sub 3]O[sub 7n[minus]3]
Journal Article
·
Thu Jul 01 00:00:00 EDT 1993
· Journal of Solid State Chemistry; (United States)
·
OSTI ID:5629327
The substitution of CO[sub 3] groups for copper in Y[sub 1[minus]x]Ca[sub x]Ba[sub 2]Cu[sub 3]O[sub 7]: HREM study
Journal Article
·
Mon Jan 31 23:00:00 EST 1994
· Journal of Solid State Chemistry; (United States)
·
OSTI ID:5047859
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRON MICROSCOPY
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRON MICROSCOPY
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS