Crystal structure of TlBa/sub 2/Ca/sub 2/Cu/sub 3/O/sub 9/

Journal Article · Tue Nov 01 04:00:00 EST 1988 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(88)90108-9· OSTI ID:6226244

Subramanian, M A; Parise, J B; Calabrese, J C; Torardi, C C; Gopalakrishnan, J; Sleight, A W

Crystals of the 110 K superconductor TlBa/sub 2/Cu/sub 3/O/sub 9/ have been grown and the structure refined from single-crystal X-ray diffraction data: a = 3.853(1), c = 15.913(4) /Angstrom/, space group P4/mmm, R = 0.055, R/sub w/ = 0.057. The structure contains triple copper-oxygen sheets separated by Ca ions which show /approximately/ 5% Tl substitution. These units alternate with single Tl-O layers. The existence of correlated atomic displacements within the thallium-oxygen sheets is again suggested by a disordered Tl-O arrangement in the average structure. The triple Cu-O sheets in TlBa/sub 2/Ca/sub 2/Cu/sub 3/O/sub 9/ are stacked directly above each other, whereas in Tl/sub 2/Ba/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/, which contains double Tl-O sheets, alternate units are shifted by (a/sub 1/ + a/sub 2/)/2.

• Research Organization: E.I. du Pont de Nemours and Company, Wilmington, DE (USA)
• OSTI ID: 6226244
• Journal Information: J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 77:1; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
CRYSTALS
DATA
DIFFRACTION
EXPERIMENTAL DATA
INFORMATION
MONOCRYSTALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SPACE GROUPS
SUPERCONDUCTORS
THALLIUM COMPOUNDS
THALLIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION