AM_Hedenbergite_25 Formula: (Ca.742 Na.258) Fe Si2 O6 Name: Hedenbergite Unit cell: 9.7938 8.9685 5.2632 90.0 105.52 90.0 , V=445.44 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: Ae251, T = 298 K