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: Ae801 _database_code_amcsd 0004211 9.6804 8.8337 5.2831 90 106.877 90 C2/c atom x y z occ Uiso Na2 0 .3004 .25 .825 .0131 Ca2 0 .3004 .25 .175 .0131 Fe3+1 0 .9003 .25 .825 .0055 Fe2+1 0 .9003 .25 .175 .0055 Si .2899 .0904 .2343 .0039 O1 .1148 .0797 .1402 .0058 O2 .3587 .2544 .3050 .0086 O3 .3508 .0105 .0084 .0072