Quartz Gualtieri A F Journal of Applied Crystallography 33 (2000) 267-278 Accuracy of XRPD QPA using the combined Rietveld-RIR method Locality: Baveno, Novara, Italy _database_code_amcsd 0012866 4.9158 4.9158 5.4091 90 90 120 P3_121 atom x y z Uiso Si .5303 0 .33333 .022 O .1462 .4142 -.1190 .019