AM_Aegirine_25 Formula: (Na.5 Ca.5) Fe Si2 O6 Name: Aegirine Unit cell: 9.7441 8.9103 5.2791 90.0 106.225 90.0 , V=440.09 Space group: C12/C1 (15)

Redhammer G J , Amthauer G , Lottermoser W , Treutmann W , European Journal of Mineralogy , 12 (2000) p.105-120, Synthesis and structural properties of clinopyroxenes of the, hedenbergite CaFeSi2O6 - aegirine NaFeSi2O6 solid-solution series, Sample: ae50/20