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 = 5.05 GPa _database_code_amcsd 0003137 9.4562 8.5997 5.2016 90 107.104 90 C2/c atom x y z Biso Na2 0 .3031 .25 1.5 Cr1 0 .9088 .25 .78 Si .2924 .0936 .2343 .95 O1 .116 .0799 .139 0.9 O2 .360 .2611 .310 1.0 O3 .359 .0131 .005 1.0