Scottyite Chen Y, Zhang Y, Feng S Dyes and Pigments 105 (2014) 167-173 Hydrothermal synthesis and properties of pigments Chinese purple BaCuSi2O6 and dark blue BaCu2Si2O7 Locality: synthetic _database_code_amcsd 0020060 6.86317 13.1773 6.86317 90 90 90 Pnma atom x y z Biso Ba -.0133 .25 .9565 .02 Cu .2208 .0034 .7919 .02 Si -.0027 .1357 .4727 .03 O1 .097 .25 .485 .01 O2 -.183 .1344 .6283 .02 O3 -.070 .1092 .2363 .02 O4 .1650 .0632 .531 .04