AM_Hedenbergite_38 Formula: (Na.25 Ca.75) Fe Si2 O6 Name: Hedenbergite Unit cell: 9.7951 8.9698 5.2634 90.0 105.523 90.0 , V=445.57 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: ae25/20