AM_Aegirine_12 Formula: (Na.951 Ca.049) Fe Si2 O6 Name: Aegirine Unit cell: 9.6554 8.7998 5.29 90.0 107.304 90.0 , V=429.13 Space group: C12/C1 (15)

Redhammer G J , Amthauer G , Roth G , Tippelt G , Lottermoser W , American Mineralogist , 91 (2006) p.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: Ae951, T = 298 K