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: PC138 Locality: sample from Pico Cabugi, Brazil _database_code_amcsd 0007728 9.709 8.875 5.263 90 106.62 90 C2/c atom x y z occ Biso CaM2 0 .2962 .25 .694 1.33 NaM2 0 .2962 .25 .052 1.33 MgM2 0 .2962 .25 .185 1.33 FeM2 0 .2962 .25 .066 1.33 MnM2 0 .2962 .25 .003 1.33 FeM2' 0 .2163 .25 .016 1.44 MgM1 0 .9071 .25 .812 .87 FeM1 0 .9071 .25 .041 .87 AlM1 0 .9071 .25 .099 .87 TiM1 0 .9071 .25 .002 .87 CrM1 0 .9071 .25 .046 .87 SiT .2889 .0927 .2340 .946 .92 AlT .2889 .0927 .2340 .054 .92 O1 .1154 .0872 .1411 1.06 O2 .3641 .2510 .3266 1.41 O3 .3515 .0190 -.0014 1.28