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 = 3.587 GPa _database_code_amcsd 0005009 9.518 8.804 5.056 90 104.04 90 C2/c atom x y z occ Uiso FeA 0 .9063 .25 .253 .0096 MgA 0 .9063 .25 .747 .0096 FeB 0 .2775 .25 .755 .0150 MgB 0 .2775 .25 .124 .0150 CaB 0 .2775 .25 .121 .0150 Si .2957 .0905 .2240 .0075 Al .2957 .0905 .2240 .0075 O1 .1221 .0895 .1431 .010 O2 .3741 .2400 .3598 .012 O3 .3521 .0485 .948 .015