Holtite Groat L A, Grew E S, Evans R J, Pieczka A, Ercit T S Mineralogical Magazine 73 (2009) 1033-1050 The crystal chemistry of holtite Sample: H4 Locality: Mt. Szklana Mine, Szklary, Zabkowice, Lower Silesia, Poland _database_code_amcsd 0019928 4.7264 11.981 20.566 90 90 90 Pnma atom x y z occ Uiso Al1 .4048 .75 .2504 .62 .030 Ta1 .4048 .75 .2504 .11 .030 Al2 .5577 .6107 .4733 .012 Al3 .0594 .4893 .4311 .010 Al4 .0596 .3577 .2894 .96 .013 Si1 .089 .75 .4080 .726 .018 Sb1 .113 .75 .3864 .22 .016 As1 .113 .75 .3864 .06 .016 Si2 .591 .5225 .3295 .73 .009 Sb2 .610 .5596 .3171 .20 .015 As2 .610 .5596 .3171 .08 .015 B .234 .25 .416 .017 O1 .376 .75 .4566 .013 O2 .159 .75 .3286 .726 .022 O3 .891 .6381 .4247 .013 O4 .401 .4363 .2824 .012 O5 .392 .5513 .3948 .010 O6 .886 .4475 .3518 .013 O7 .658 .635 .2880 .73 .022 O8 .178 .25 .3498 .012 O9 .253 .3504 .4474 .018 O10 .769 .25 .2730 .014 O11 .749 .4683 .4871 .007