AM_Ilvaite_34
Formula: Fe3 Ca Si2 O9 H
Name: Ilvaite
Unit cell: 13.0497 8.8291 5.8652 90.0 90.029 90.0 , V=675.77
Space group: P121/A1 (14)

Ghose S , Tsukimura K , Hatch D M , Physics and Chemistry of Minerals , 16 (1989) p.483-496, Phase transitions in ilvaite, a mixed-valence iron silicate, II. A single-crystal X-ray diffraction study and Landau theory of the, monoclinic to orthorhombic phase transition induced by charge delocalization, Sample: T = 360 K