AM_Pigeonite_59
Formula: (Mg.464 Fe.416 Mn.014 Ca.107) Si O3
Name: Pigeonite
Unit cell: 9.824 9.017 5.309 90.0 109.19 90.0 , V=444.16
Space group: P121/C1 (14)

Camara F , Carpenter M A , Domeneghetti M C , Tazzoli V , Physics and Chemistry of Minerals , 29 (2002) p.331-340, Non-convergent ordering and displacive phase transition in pigeonite:, in situ HT XRD study, Sample: hgg, T = 750 C