Crystal structure of YBa/sub 2/Cu/sub 3/O/sub 6/, the x = 1 phase of the superconductor YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/

Journal Article · Wed Jul 01 00:00:00 EDT 1987 · J. Mat. Res.; (United States)

OSTI ID:6361003

Swinnea, J S; Steinfink, H

Black crystals, displaying a micaceous habit, result from heating and 90 K superconducting phase YBa/sub 2/Cu/sub 3/O/sub 7-//sub y/ above 1050 /sup 0/C. The crystals are tetragonal, P4/mmm, a = 3.863 (2) A, c = 11.830 (4) A, Z = 1, rho/sub cal/ = 6.115 g/cm/sup 3/. The 184 independent single-crystal reflections were used to refine the structure by least squares to R = 0.0374, wR = 0.0347. The structure contains Cu/sup +/ in two-fold coordination and corrugated layers of Cu/sup 2 +/-0. The Ba/sup 2 +/ is in eightfold coordination between the Cu/sup +/ and Cu/sup 2 +/ layers and Y is in eightfold coordination between the Cu/sup 2 +/ layers.

• Research Organization: Materials Science and Engineering Program, Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712
• OSTI ID: 6361003
• Journal Information: J. Mat. Res.; (United States), Vol. 2:4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CRYSTAL STRUCTURE
COPPER OXIDES
YTTRIUM OXIDES
DIFFERENTIAL THERMAL ANALYSIS
MONOCRYSTALS
SUPERCONDUCTORS
TETRAGONAL LATTICES
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTALS
DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
SCATTERING
THERMAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies