Diopside Oberti R, Caporuscio F A American Mineralogist 76 (1991) 1141-1152 Crystal chemistry of clinopyroxenes from mantle eclogites: A study of the key role of the M2 site population by means of crystal-structure refinement sample SBB 3H, Di64Jd26, diopside - jadeite join _database_code_amcsd 0001366 9.654 8.831 5.255 90 106.52 90 C2/c atom x y z occ Biso Mg1 0 .9059 .25 .62 0.59 Al1 0 .9059 .25 .28 0.59 Fe1 0 .9059 .25 .09 0.59 Ti1 0 .9059 .25 .01 0.59 Ca2 0 .3005 .25 .65 0.89 Na2 0 .3005 .25 .26 0.89 Mg2 0 .3005 .25 .03 0.75 Fe2 0 .3005 .25 .04 0.75 Si .2876 .0928 .2298 0.47 O1 .1139 .0835 .1381 0.85 O2 .3608 .2535 .3134 0.92 O3 .3515 .0154 -.0009 0.70