Bartelkeite Origlieri M J, Yang H, Downs R T, Posner E S, Domanik K J, Pinch W W American Mineralogist 97 (2012) 1812-1815 The crystal structure of bartelkeite, with a revised chemical formula, PbFeGeVI(GeIV2O7)(OH)2*H2O, isotypic with high-pressure P21/m lawsonite Locality: Tsumeb, Namibia _database_code_amcsd 0019471 5.8279 13.6150 6.3097 90 127.314 90 P2_1/m atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Pb .32486 .75 .67674 .01488 .01415 .01555 .01618 0 .00984 0 Fe .5 0 0 .00769 .00820 .00870 .00662 -.00161 .00473 -.00110 Ge1 .5 0 .5 .00773 .00759 .01004 .00554 .00282 .00397 .00176 Ge2 .96137 .12998 .99604 .00688 .00581 .00720 .00654 .00054 .00318 .00011 O1 .90129 .75 .93503 .01573 .01053 .00637 .02662 0 .00935 0 O2 .75120 .11152 .65453 .01284 .01201 .01457 .00844 -.00314 .00437 -.00011 O3 .78204 .38528 .13370 .01144 .01291 .01169 .01320 .00402 .00972 .00415 O4 .28375 .06250 .16104 .00884 .00831 .01187 .00631 .00528 .00441 .00316 O5H .28929 .05245 .60363 .01156 .00871 .01797 .00741 .00372 .00457 .00174 O6W .76173 .75 .32159 .02397 .02783 .01227 .03305 0 .01910 0 H1 .14279 .07756 .49540 .03 H2 .71283 .79771 .35539 .03