Aegirine Redhammer G J, Amthauer G, Roth G, Tippelt G, Lottermoser W American Mineralogist 91 (2006) 1271-1292 Single crystal X-ray diffraction and temperature dependent 57Fe Mossbauer spectroscopy on the hedenbergite - aegirine (Ca,Na)(Fe2+,Fe3+)Si2O6 solid solution Locality: synthetic Sample: Ae901, T = 298 K _database_code_amcsd 0004213 9.6666 8.8099 5.2916 90 107.195 90 C2/c atom x y z occ Uiso Na2 0 .3003 .25 .898 .0117 Ca2 0 .3003 .25 .102 .0117 Fe3+1 0 .8994 .25 .898 .0022 Fe2+1 0 .8994 .25 .102 .0022 Si .2903 .0895 .2346 .0013 O1 .1147 .0787 .1387 .0041 O2 .3584 .2555 .3015 .0053 O3 .3519 .0087 .0095 .0044