Diopside Warren B, Biscoe J Zeitschrift fur Kristallographie 80 (1931) 391-401 The Crystal Structure of monoclinic pyroxenes _cod_database_code 1011047 _database_code_amcsd 0017949 9.71 8.89 5.24 90 74.17 90 C2/c atom x y z Ca1 0 -.31 .25 Mg1 0 .08 .25 Si1 .21 .41 .24 O1 .38 .4 .14 O2 .14 .25 .32 O3 .16 .48 0