Hts Logo

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: Crystal Structure of La1.85Ba0.15CaCu2O6+y Determined by Neutron Powder Diffraction
Author(s): J.M. Navarro, A. Fuertes, P. Gomez-Romero, and J. Rodriguez-Carvajal
Publication: Solid State Communications Volume: 81 Issue: 8 Year: 1992 Page(s): 677-681
Editor(s): Not Available
Publisher: Pergamon Press Ltd
Language: English
Notes: Not Available
Keywords: Material Specification, Crystallography, Critical Temperature

Materials and Properties

CaLa:122; [Ca-La(Ba)-Cu-O]
Material Specification for CaLa:122; [Ca-La(Ba)-Cu-O] Process: Solid State Reaction
Notes: No processing details were noted.
Formula: La1.85Ba0.15CaCu2O6+y
Informal Name: CaLa:122
Chemical Family: Ca-La(Ba)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Crystallography for CaLa:122; [Ca-La(Ba)-Cu-O]
Crystal System: Tetragonal
Formula Units per Cell:
Space Group: I4/mmm
Cell Parameters
Occupancy () Temp K a Å b Å c Å
-- 1.5 3.82737(7) -- 19.4655(5)
-- 296 3.83304(6) -- 19.5327(5)
Atomic Coordinates
Occupancy () Atom Temp K a-axis b-axis c-axis
0.76 Ca(1) 1.5 0.0000 0.0000 0.0000
0.24 La(1) 1.5 0.0000 0.0000 0.0000
1.62 La(2) 1.5 0.0000 0.0000 0.1756(1)
0.23 Ca(2) 1.5 0.0000 0.0000 0.1756(1)
0.15 Ba(2) 1.5 0.0000 0.0000 0.1756(1)
2.00 Cu 1.5 0.0000 0.0000 0.5851(1)
4.00 O(1) 1.5 0.0000 0.5000 0.0830(1)
2.00 O(2) 1.5 0.0000 0.0000 0.7034(2)
0.04 O(3) 1.5 0.0000 0.0000 0.5000
0.76(5) Ca(1) 296 0.0000 0.0000 0.0000
0.24(5) La(1) 296 0.0000 0.0000 0.0000
1.62(2) La(2) 296 0.0000 0.0000 0.1759(1)
0.23(2) Ca(2) 296 0.0000 0.0000 0.1759(1)
0.15 Ba(2) 296 0.0000 0.0000 0.1759(1)
2.00 Cu 296 0.0000 0.0000 0.5852(1)
4.00 O(1) 296 0.0000 0.5000 0.0820(1)
2.00 O(2) 296 0.0000 0.0000 0.7031(2)
0.04(1) O(3) 296 0.0000 0.0000 0.5000
Measurement Method: Neutron powder diffraction
"Neutron powder diffraction measurements were performed at 1.5 K and 295 K with the high resolution Diffractometer D2B at the Institut Laue Langevin in Grenoble. Neutrons of wavelength 1.5945 σ were selected for the experiments. The sample container was a vanadium can of about 1 cm diameter and 5 cm length. The data were collected in the angular range 0-160° (2 theta) and preselected monitor counts for a fixed position of the detector bank were 150000."

Cautions: Evaluated Data
Critical Temperature for CaLa:122; [Ca-La(Ba)-Cu-O]
Critical Temperature (K)
47
Measurement Method: Unknown Tc method

Cautions: Unevaluated Data