Effenbergerite 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 = 1.000 _database_code_amcsd 0018775 7.43602 7.43602 16.1302 90 90 90 *P4/ncc .25 -.25 0 atom x y z occ Uiso Ba .25 .75 0 .118 Cu .25 .25 .0949 .095 Si .5177 .9390 .1539 .041 O1 .4573 .9934 .2452 .5 .056 O2 .7247 .0000 .1367 .086 O3 .3866 .0314 .0903 .109