Paracelsian
Chiari G, Gazzoni G, Craig J R, Gibbs G V, Louisnathan S J
American Mineralogist 70 (1985) 969-974
Two independent refinements of the structure of paracelsian, BaAl2Si2O8
Locality: Benallt Mine, Carnarvonshire, U.K.
Sample: CLG refinement
_database_code_amcsd 0000998
9.065 9.568 8.578 90 90.01 90 P2_1/a
atom      x      y      z Uiso
Ba   .89785 .41174 .25107 .008
Al1   .0642  .1939  .5726 .005
Si1   .0688  .1994  .9411 .004
Al2   .2242  .9214  .9302 .005
Si2   .2307  .9167  .5625 .005
O1o   .1948  .0898  .9991 .008
O1m   .1925  .0725  .5038 .011
O2o   .1272  .3605  .9556 .010
O2m   .1315  .3642  .5445 .008
O3o   .9298  .1848  .0595 .008
O3m   .9091  .1844  .4495 .005
O4    .0188  .1657  .7642 .012
O5    .2916  .9108  .7390 .009