Wesselsite Knight K S, Henderson C M B, Clark S M European Journal of Mineralogy 22 (2010) 411-423 Structural variations in the wesselsite-effenbergerite (Sr1-xBaxCuSi4O10) solid solution Locality: synthetic Sample: x = .402 _database_code_amcsd 0018771 7.38801 7.38801 15.8265 90 90 90 *P4/ncc .25 -.25 0 atom x y z occ Uiso Ba .25 .75 0 .402 .072 Sr .25 .75 0 .598 .072 Cu .25 .25 .0919 .086 Si .5116 .9333 .1521 .047 O1 .4515 .9867 .2455 .5 .116 O2 .7177 .0004 .1337 .100 O3 .3736 .0230 .0883 .110