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 = .821 _database_code_amcsd 0018774 7.41932 7.41932 16.0402 90 90 90 *P4/ncc .25 -.25 0 atom x y z occ Uiso Ba .25 .75 0 .821 .126 Sr .25 .75 0 .179 .126 Cu .25 .25 .0942 .106 Si .5156 .9374 .1534 .045 O1 .4546 .9921 .2454 .5 .070 O2 .7228 .0003 .1361 .082 O3 .3824 .0287 .0897 .109