Mattheddleite Steele I M, Pluth J J, Livingstone A Mineralogical Magazine 64 (2000) 915-921 Crystal structure of mattheddleite: a Pb, S, Si phase with the apatite structure Locality: Leadhills, Scotland _database_code_amcsd 0014546 10.0056 10.0056 7.4960 90 90 120 P6_3/m atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Pb1 1/3 2/3 .0057 5/8 .0331 .0364 .0364 .0264 .0182 0 0 Pb2 .2507 -.0004 .2136 5/8 .0402 .0296 .0415 .050 .0182 .0176 .0058 Si .4058 .3814 .25 .5 .014 .013 .010 .020 .008 0 0 S .4058 .3814 .25 .5 .014 .013 .010 .020 .008 0 0 O1 .332 .487 .25 .028 .034 .033 .025 .023 0 0 O2 .589 .480 .25 .039 .010 .040 .059 .007 0 0 O3 .357 .275 .082 .038 .055 .032 .035 .029 -.007 -.003 Cl 0 0 0 .57 .035 .032 .032 .042 .016 0 0 OH 0 0 0 .43 .035 .032 .032 .042 .016 0 0