Pigeonite Alvaro M, Nestola F, Ballaran T B, Camara F, Domeneghetti M C, Tazzoli V American Mineralogist 95 (2010) 300-311 High-pressure phase transition of a natural pigeonite Locality: Parana, Brazil Note: P = 3.167 GPa _database_code_amcsd 0005007 9.621 8.827 5.199 90 107.82 90 P2_1/c atom x y z occ Uiso FeA .2509 .6565 .2286 .253 .0103 MgA .2509 .6565 .2286 .747 .0103 FeB .2573 .0219 .2245 .755 .0120 MgB .2573 .0219 .2245 .124 .0120 CaB .238 .033 .256 .121 .03 SiA .0412 .3417 .2732 .99 .0099 AlA .0412 .3417 .2732 .01 .0099 SiB .5499 .8378 .2332 .99 .0071 AlB .5499 .8378 .2332 .01 .0071 O1A .8676 .3400 .171 .010 O1B .3742 .8373 .131 .009 O2A .1200 .5035 .330 .009 O2B .6259 .9876 .370 .015 O3A .104 .2623 .573 .022 O3B .6070 .7059 .470 .015