Barylite
Robinson P D, Fang J H
American Mineralogist 62 (1977) 167-169
Barylite, BaBe2Si2O7: its space group and crystal structure
Locality: amazonite pocket, Park County, Colorado, USA
_database_code_amcsd 0000560
9.820 11.670 4.690 90 90 90 Pnma
atom     x     y     z Biso
Ba   .1516   .75 .2470  .79
Be   .1610 .5020 .7030  .60
Si   .0885 .3779 .1995  .50
O1   .4291 .3846 .2175  .63
O2   .1874 .4712 .3558  .51
O3   .1072 .3868 .8592  .74
O4   .1454   .25 .2958  .50