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 = 9.405 GPa _database_code_amcsd 0005013 9.366 8.682 4.974 90 103.09 90 C2/c atom x y z occ Uiso FeA 0 .9080 .25 .253 .011 MgA 0 .9080 .25 .747 .011 FeB 0 .2805 .25 .755 .014 MgB 0 .2805 .25 .124 .014 CaB 0 .2805 .25 .121 .014 Si .2954 .0911 .2188 .99 .0083 Al .2954 .0911 .2188 .01 .0083 O1 .1217 .0890 .139 .007 O2 .3732 .2428 .361 .010 O3 .352 .0523 .935 .013