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NIST High Temp. Superconducting Materials (HTS) Database:

NIST Standard Reference Database 62

Last Update to Data Content: 1996

DOI: https://doi.org/10.18434/T4KP8J

Bibliographic Information

Title: A Neutron Diffraction Study of the System Y1-yCayBa2-yLayCu3O7-x
Author(s): P.R. Slater and C. Greaves
Publication: Superconductor Science and Technology Volume: 5 Issue: Not Available Year: 1992 Page(s): 205-209
Editor(s): Not Available
Publisher: IOP Publishing Ltd
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature

Materials and Properties

Y:123; [Y(Ca)-Ba(La)-Cu-O]
Material Specification for Y:123; [Y(Ca)-Ba(La)-Cu-O] Process: Solid State Reaction
Notes: "High-purity Y2O3, CaCO3, BaCO3, La2O3 and CuO were used to prepare... samples... The intimately ground powders were heated at 940 °C for 12 h in air, reground, and reheated at 940 °C for 12 h in flowing oxygen, and slowly cooled (20 h) to ambient temperature."
Formula: Y1-xCaxBa2-xLaxCu3O7-y
Informal Name: Y:123
Chemical Family: Y(Ca)-Ba(La)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for Y:123; [Y(Ca)-Ba(La)-Cu-O]
Crystal System:
Formula Units per Cell:
Space Group:
Cell Parameters
y of Cay (formula units) Occupancy () Temp K a Å b Å c Å
0.05 -- 296 3.827(1) 3.881(1) 11.672(3)
0.10 -- 296 3.828(1) 3.878(1) 11.670(3)
0.20 -- 296 3.833(1) 3.873(1) 11.658(3)
0.30 -- 296 3.839(1) 3.863(1) 11.656(3)
0.40 -- 296 3.852(1) -- 11.653(3)
0.50 -- 296 3.854(1) -- 11.646(3)
0.70 -- 296 3.858(1) -- 11.637(3)
Atomic Coordinates
y of Cay (formula units) Occupancy () Atom Temp K a-axis b-axis c-axis
0.05 0.89(5) Y 296 0.5 0.5 0.5
0.05 0.11(5) Ca 296 0.5 0.5 0.5
0.05 1.90(10) Cu(1) 296 0.5 0.5 0.1850(4)
0.05 0.10(10) Cu(2) 296 0.5 0.5 0.1850(4)
0.05 1.0 O(1) 296 0 0.5 0
0.05 2.0 O(2) 296 0.5 0 0.3556(2)
0.05 2.0 O(3) 296 0 0.5 0.3768(4)
0.05 2.0 O(4) 296 0 0 0.1581(3)
0.05 0.08(2) O(5) 296 0.5 0 0
0.10 0.90(5) Y 296 0.5 0.5 0.5
0.10 0.10(5) Ca 296 0.5 0.5 0.5
0.10 1.84(10) Ba 296 0.5 0.5 0.1853(3)
0.10 0.16(10) La 296 0.5 0.5 0.1853(3)
0.10 1.0 Cu(1) 296 0 0 0
0.10 2.0 Cu(2) 296 0 0 0.33556(2)
0.10 0.86(2) O(1) 296 0 0.5 0
0.10 2.0 O(2) 296 0.5 0 0.3755(4)
0.10 2.0 O(3) 296 0 0.5 0.3767(4)
0.10 2.0 O(4) 296 0 0 0.1578(3)
0.10 0.08(2) O(5) 296 0.5 0 0
0.20 0.75(5) Y 296 0.5 0.5 0.5
0.20 0.25(5) Ca 296 0.5 0.5 0.5
0.20 1.70(10) Ba 296 0.5 0.5 0.1858(3)
0.20 0.30(10) La 296 0.5 0.5 0.1858(3)
0.20 1.0 Cu(1) 296 0 0 0
0.20 2.0 Cu(2) 296 0 0 0.3563(2)
0.20 0.82(3) O(1) 296 0 0.5 0
0.20 2.0 O(2) 296 0.5 0 0.3733(4)
0.20 2.0 O(3) 296 0 0.5 0.3767(5)
0.20 2.0 O(4) 296 0 0 0.1577(3)
0.20 0.14(2) O(5) 296 0.5 0 0
0.30 0.67(5) Y 296 0.5 0.5 0.5
0.30 0.33(5) Ca 296 0.5 0.5 0.5
0.30 1.72(10) Ba 296 0.5 0.5 0.1871(3)
0.30 0.28(10) La 296 0.5 0.5 0.1871(3)
0.30 1.0 Cu(1) 296 0 0 0
0.30 2.0 Cu(2) 296 0 0 0.3563(2)
0.30 0.69(3) O(1) 296 0 0.5 0
0.30 2.0 O(2) 296 0 0 0.3703(5)
0.30 2.0 O(3) 296 0 0.5 0.3772(5)
0.30 2.0 O(4) 296 0 0 0.1574(3)
0.30 0.28(2) O(5) 296 0.5 0 0
0.4 0.64(5) Y 296 0.5 0.5 0.5
0.4 0.36(5) Ca 296 0.5 0.5 0.5
0.4 1.66(1) Ba 296 0.5 0.5 0.1882(3)
0.4 0.34(10) La 296 0.5 0.5 0.1882(3)
0.4 1.0 Cu(1) 296 0 0 0
0.4 2.0 Cu(2) 296 0 0 0.3564(2)
0.4 0.96(8) O(1) 296 0 0.5 0.07(1)
0.4 4.0 O(2) 296 0.5 0 0.3727(2)
0.4 2.0 O(4) 296 0 0 0.1569(3)
0.5 0.70(5) Y 296 0.5 0.5 0.5
0.5 0.30(5) Ca 296 0.5 0.5 0.5
0.5 1.58(10) Ba 296 0.5 0.5 0.1876(3)
0.5 0.42(10) La 296 0.5 0.5 0.1876(3)
0.5 1.0 Cu(1) 296 0 0 0
0.5 2.0 Cu(2) 296 0 0 0.3550(2)
0.5 1.04(8) O(1) 296 0 0.5 0
0.5 4.0 O(2) 296 0.5 0 0.3717(2)
0.5 2.0 O(4) 296 0 0 0.1572(4)
0.7 0.67(5) Y 296 0.5 0.5 0.5
0.7 0.33(5) Ca 296 0.5 0.5 0.5
0.7 1.38(10) Ba 296 0.5 0.5 0.1873(4)
0.7 0.62(10) La 296 0.5 0.5 0.1873(4)
0.7 1.0 Cu(1) 296 0 0 0
0.7 2.0 Cu(2) 296 0 0 0.3542(2)
0.7 1.4(1) O(1) 296 0 0.5 0
0.7 4.0 O(2) 296 0 0 0.3682(2)
0.7 2.0 O(4) 296 0 0 0.1590(5)
Measurement Method: Neutron diffraction
"Time-of-flight neutron powder diffraction... data were collected... on the diffractometer POLARIS at ISIS, Rutherford Appleton Laboratory. Structure refinement was based on the Rietveld method using the Cambridge Crystallography Subroutine Library..."

Cautions: Evaluated Data
Critical Temperature for Y:123; [Y(Ca)-Ba(La)-Cu-O]
y of Cay (formula units) Critical Temperature (K)
0.05 87
0.10 85
0.20 80
0.30 79
0.40 79
0.50 78
0.70 78
Measurement Method: Ac susceptibility

Cautions: Unevaluated Data
No measurement details were noted.