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 = .276
_database_code_amcsd 0018770
7.37735 7.37735 15.7266 90 90 90 *P4/ncc
.25 -.25 0
atom     x     y     z  occ Uiso
Ba     .25   .75     0 .276 .048
Sr     .25   .75     0 .724 .048
Cu     .25   .25 .0908      .084
Si   .5097 .9321 .1515      .062
O1   .4503 .9853 .2454   .5 .110
O2   .7167 .0012 .1328      .099
O3   .3712 .0219 .0876      .097