Ba2 Cu3 O6.91 Y Francois M, Junod A, Yvon K, Hewat A, Capponi J, Strobel P, Marezio M, Fischer P Solid State Communications 66 (1988) 1117-1125 A study of the Cu-O chains in the high Tc superconductor Y Ba2 Cu3 O7 by high resolution neutron powder diffraction _cod_database_code 1008390 _database_code_amcsd 0016299 CELL PARAMETERS: 3.8121 3.8798 11.6542 90.000 90.000 90.000 SPACE GROUP: Pmmm X-RAY WAVELENGTH: 1.541838 Cell Volume: 172.368 Density (g/cm3): 6.403 MAX. ABS. INTENSITY / VOLUME**2: 2.327204583 RIR: 0.118 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 7.59 100.00 11.6542 0 0 1 2 15.20 8.95 5.8271 0 0 2 2 22.89 2.61 3.8847 0 0 3 2 22.92 7.31 3.8798 0 1 0 2 23.33 2.17 3.8121 1 0 0 2 27.97 1.11 3.1901 1 0 2 4 32.62 18.51 2.7452 0 1 3 4 32.92 18.19 2.7209 1 0 3 4 32.94 16.30 2.7192 1 1 0 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.