Colinowensite Sparta K M, Roth G Acta Crystallographica B60 (2004) 491-495 Reinvestigation of the structure of BaCuSi2O6 - evidence for a phase transition at high temperature Note: T = 293 K Locality: synthetic _database_code_amcsd 0018747 10.0091 10.0091 22.467 90 90 90 *I4_1/acd 0 -.25 .125 atom x y z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Ba .25 .9887 .5 .0132 .012 .01251 0 -.0018 0 Cu 0 .25 .06374 .0089 .0092 .0123 0 0 0 Si .27554 .7511 .876 .0078 .0069 .014 .0002 -.007 -.0008 O1 .1916 .7218 .8166 .010 .016 .017 .005 .003 .002 O2 .3725 .8786 .85939 .016 .015 .037 -.0024 -.003 .002 O3 .3075 .7813 .0639 .008 .015 .019 -.004 .002 .012