Burtite Basciano L C, Peterson R C, Roeder P L The Canadian Mineralogist 36 (1998) 1203-1210 Description of schoenfliesite, MgSn(OH)6, and roxbyite, Cu1.72S, from a 1375 BC shipwreck, and rietveld neutron-diffraction refinement of synthetic schoenfliesite, wickmanite, MnSn(OH)6, and burtite, CaSn(OH)6 Locality: a 1375 BC shipwreck _database_code_amcsd 0005567 8.1221 8.1221 8.1221 90 90 90 *Pn3 .25 .25 .25 atom x y z occ Ca 0 0 0 Sn .5 .5 .5 H1 -.0346 .2011 .2869 .5 H2 -.1805 .0638 .3026 .5 O -.0663 .0787 .2694