Schwartzembergite Welch M D, Hawthorne F C, Cooper M A, Kyser T K The Canadian Mineralogist 39 (2001) 785-795 Trivalent iodine in the crystal structure of schwartzembergite, Pb5IO6H2Cl3 _database_code_amcsd 0005721 3.977 3.977 12.566 90 90 90 I4/mmm atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Pb 0 0 .1421 .833 .0024 .0024 .0022 0 0 0 I 0 0 .185 .167 .0011 .0011 .0031 0 0 0 Cl 0 0 .5 .0024 .0024 .0040 0 0 0 O .5 0 .25 .0031 .0031 .0032 0 0 0