Kosmochlor Origlieri M J, Downs R T, Thompson R M, Pommier C J S, Denton M B, Harlow G E American Mineralogist 88 (2003) 1025-1032 High-pressure crystal structure of kosmochlor, NaCrSi2O6, and systematics of anisotropic compression in pyroxenes Sample: P = 3.53 GPa _database_code_amcsd 0003136 9.4867 8.6323 5.2206 90 107.221 90 C2/c atom x y z Biso Na2 0 .3020 .25 1.4 Cr1 0 .9084 .25 .93 Si .2928 .0922 .2347 .93 O1 .1146 .0802 .140 1.2 O2 .3604 .2605 .308 1.2 O3 .3535 .0142 .008 0.9