Davidite-(La) Gatehouse B M, Grey I E, Kelly P R American Mineralogist 64 (1979) 1010-1017 The crystal structure of davidite Locality: Pandora Prospect, Quijotoa Mts., Pima County, Arizona, USA _database_code_amcsd 0000749 9.190 9.190 9.190 68.73 68.73 68.73 R-3 atom x y z occ Biso La(0) 0 0 0 .540 1.17 Ca(0) 0 0 0 .200 1.17 Sr(0) 0 0 0 .090 1.17 La(1) .5 .5 .5 .370 0.53 U(1) .5 .5 .5 .330 0.53 Y(1) .5 .5 .5 .300 0.53 Fe(2) .3090 .3090 .3090 .790 0.47 Mg(2) .3090 .3090 .3090 .120 0.47 Fe(3) .3474 .1269 .0184 .762 0.51 Ti(3) .3474 .1269 .0184 .112 0.51 Cr(3) .3474 .1269 .0184 .035 0.51 Ti(4) .3086 .7218 .1448 0.34 Ti(5) .4749 .0775 .6444 0.30 O(1) .2999 .6300 .3765 0.54 O(2) .1486 .2347 .9391 0.49 O(3) .9192 .4574 .3025 0.43 O(4) .1446 .5137 .9897 0.55 O(5) .3891 .4869 .1345 0.52 O(6) .7131 .2404 .0688 0.48 O(7) .2134 .2134 .2134 0.59