AM_Magnesiochloritoid
Formula: Al2 (Mg.65 Fe.35) Si O7 H2
Name: Magnesiochloritoid
Unit cell: 9.46 5.471 18.182 90.0 101.4 90.0 , V=922.46
Space group: C12/C1 (15)

Ivaldi G , Catti M , Ferraris G , American Mineralogist , 73 (1988) p.358-364, Crystal structure at 25 and 700 C of magnesiochloritoid from a high-pressure, assemblage (Monte Rosa), Sample at 25 C