Aegirine McCarthy A C, Downs R T, Thompson R M, Redhammer G J American Mineralogist 93 (2008) 1829-1837 In situ high-pressure single-crystal X-ray study of aegirine, NaFe3+Si2O6, and the role of M1 size in clinopyroxene compressibility Locality: synthetic Note: Pressure = 10.82 GPa _database_code_amcsd 0004766 9.4038 8.5221 5.1465 90 106.256 90 C2/c atom x y z Biso Na 0 .3059 .25 1.07 Fe 0 .9021 .25 .74 Si .2916 .0922 .2377 .69 O1 .1141 .0822 .1414 .72 O2 .3573 .2619 .3186 .96 O3 .3564 .0192 .0032 .86