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 1008408 _database_code_amcsd 0016317 CELL PARAMETERS: 3.8136 3.8806 11.6620 90.000 90.000 90.000 SPACE GROUP: Pmmm X-RAY WAVELENGTH: 1.541838 Cell Volume: 172.587 Density (g/cm3): 6.395 MAX. ABS. INTENSITY / VOLUME**2: 2.296759656 RIR: 0.117 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 7.58 100.00 11.6620 0 0 1 2 15.19 14.78 5.8310 0 0 2 2 22.88 1.66 3.8873 0 0 3 2 22.92 3.03 3.8806 0 1 0 2 23.33 1.25 3.8136 1 0 0 2 32.60 8.53 2.7464 0 1 3 4 32.90 7.69 2.7223 1 0 3 4 32.93 7.39 2.7200 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.