AM_Aegirine_28 Formula: (Na.9 Ca.1) Fe Si2 O6 Name: Aegirine Unit cell: 9.6714 8.8152 5.2926 90.0 107.166 90.0 , V=431.12 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: ae90/13