Diopside Salviulo G, Princivalle F, Demarchi G, Fabro C Physics and Chemistry of Minerals 19 (1992) 213-219 Effects of Ca-Mg substitution in C2/c pyroxene structure on natural clinopyroxenes from spinel peridotite nodules (Pico Cabugi, Brazil) Sample: PC109 Locality: sample from Pico Cabugi, Brazil _database_code_amcsd 0007730 9.716 8.887 5.260 90 106.57 90 C2/c atom x y z occ Biso CaM2 0 .2958 .25 .720 1.55 NaM2 0 .2958 .25 .027 1.55 MgM2 0 .2958 .25 .179 1.55 FeM2 0 .2958 .25 .071 1.55 MnM2 0 .2958 .25 .003 1.55 FeM2' 0 .2158 .25 .014 1.64 MgM1 0 .9071 .25 .851 1.01 FeM1 0 .9071 .25 .026 1.01 AlM1 0 .9071 .25 .080 1.01 TiM1 0 .9071 .25 .003 1.01 CrM1 0 .9071 .25 .040 1.01 SiT .2889 .0927 .2341 .9455 1.07 AlT .2889 .0927 .2341 .0545 1.07 O1 .1161 .0876 .1422 1.20 O2 .3647 .2501 .3275 1.55 O3 .3517 .0193 -.0011 1.40