Burkeite Giuseppetti G, Mazzi F, Tadini C Neues Jahrbuch fur Mineralogie, Monatshefte 1988 (1988) 203-221 The crystal structure of synthetic burkeite Sample C Note sign of y-coordinate for O3 and O5 altered to reproduce reported bond lengths Locality: synthetic _database_code_amcsd 0014825 5.198 9.255 7.085 90 90 90 *Pmnm .25 0 .25 atom x y z occ Biso Na1 .25 .7512 .0047 2.39 Na2 .25 .4250 .25 5.79 Na3 .75 .8805 .25 2.45 C .75 .5606 .25 .49 1.84 S1 .75 .5606 .25 .51 1.84 S2 .2942 .0896 .25 .5 1.30 O1 .75 .4216 .25 .83 4.2 O2 .5358 .6429 .25 .83 2.7 O3 .75 -.4701 .0854 .17 5.9 O4 .9310 .5834 .0888 .17 4.5 O5 .1892 -.1606 .0816 .5 2.9 O6 .2177 -.0651 .25 .5 1.7 O7 .5755 .1071 .25 .5 2.3