Geocronite Birnie R W, Burnham C W American Mineralogist 61 (1976) 963-970 The crystal structure and extent of solid solution of geocronite _database_code_amcsd 0000530 8.963 31.93 8.500 90 118.02 90 P2_1/m atom x y z Biso Pb1 .445 .0566 .350 1.3 Pb2 .441 .0486 .844 1.4 Pb3 .903 .0438 .322 1.3 Sb4 .922 .0465 .836 .8 Pb5 .263 .1414 .001 1.5 As6 .271 .1505 .511 .3 Pb7 .788 .1487 .018 1.6 Pb8 .790 .1532 .516 1.2 Pb9 .120 .25 .175 2.2 Pb10 .121 .25 .691 1.5 Sb11 .613 .2214 .180 .5 Pb12 .547 .25 .638 3.0 S1 .287 .002 .000 1.5 S2 .307 .002 .547 3.0 S3 .050 .085 .113 .2 S4 .063 .085 .686 1.9 S5 .656 .100 .196 .0 S6 .654 .090 .704 .3 S7 .409 .178 .370 1.2 S8 .405 .180 .784 .7 S9 .025 .183 .387 -.4 S10 .986 .202 .882 2.9 S11 .370 .261 .051 -1.5 S12 .749 .25 .021 1.7 S13 .746 .25 .455 -.2