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 1008400 _database_code_amcsd 0016309 CELL PARAMETERS: 3.8097 3.8788 11.6397 90.000 90.000 90.000 SPACE GROUP: Pmmm X-RAY WAVELENGTH: 1.541838 Cell Volume: 172.001 Density (g/cm3): 6.417 MAX. ABS. INTENSITY / VOLUME**2: 3.258384407 RIR: 0.165 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 7.60 66.28 11.6397 0 0 1 2 15.22 20.45 5.8198 0 0 2 2 22.92 7.77 3.8799 0 0 3 2 22.93 10.63 3.8788 0 1 0 2 23.35 4.63 3.8097 1 0 0 2 24.19 1.33 3.6799 0 1 1 4 27.64 2.74 3.2276 0 1 2 4 27.99 3.61 3.1875 1 0 2 4 32.64 52.24 2.7431 0 1 3 4 32.95 49.69 2.7183 1 0 3 4 32.95 50.31 2.7180 1 1 0 4 38.68 1.31 2.3277 0 1 4 4 38.95 1.21 2.3125 1 0 4 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.