Burkeite
Giuseppetti G, Mazzi F, Tadini C
Neues Jahrbuch fur Mineralogie, Monatshefte 1988 (1988) 203-221
The crystal structure of synthetic burkeite Na4SO4(CO3)t(SO4)1-t
Sample A
Note sign of y-coordinate for O3 and O5 altered to reproduce reported bond lengths
Locality: synthetic
_database_code_amcsd 0014823
5.170 9.217 7.058 90 90 90 *Pmnm
.25 0 .25
atom     x      y     z occ Biso
Na1    .25  .7509 .0051     2.24
Na2    .25  .4254   .25     5.46
Na3    .75  .8754   .25     2.19
CT1    .75  .5584   .25 .61 1.61
ST1    .75  .5584   .25 .39 1.61
ST2  .2951  .0913   .25  .5 1.16
O1     .75  .4226   .25 .85  3.8
O2   .5357  .6403   .25 .88  2.9
O3     .75 -.4693 .0819 .15  5.5
O4   .9307  .5809 .0951 .12  6.0
O5   .1927 -.1645 .0815  .5  2.5
O6   .2164 -.0632   .25  .5  1.5
O7   .5798  .1057   .25  .5  2.2