AM_Hedenbergite_21 Formula: (Ca.949 Na.051) Fe Si2 O6 Name: Hedenbergite Unit cell: 9.8354 9.0108 5.256 90.0 105.088 90.0 , V=449.75 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: Ae051, T = 298 K