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 1008407 _database_code_amcsd 0016316 CELL PARAMETERS: 3.8128 3.8802 11.6580 90.000 90.000 90.000 SPACE GROUP: Pmmm X-RAY WAVELENGTH: 1.541838 Cell Volume: 172.473 Density (g/cm3): 6.399 MAX. ABS. INTENSITY / VOLUME**2: 2.750853702 RIR: 0.140 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 7.58 100.00 11.6580 0 0 1 2 15.20 2.50 5.8290 0 0 2 2 22.88 2.91 3.8860 0 0 3 2 22.92 4.44 3.8802 0 1 0 2 23.33 2.34 3.8128 1 0 0 2 24.56 1.73 3.6239 1 0 1 4 32.61 10.92 2.7458 0 1 3 4 32.91 9.87 2.7216 1 0 3 4 32.93 9.45 2.7196 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.