AM_Hingganite-(Y)_3 Formula: (Y1.02 Yb.72 Ca.26) Si2 Be2 Fe.065 O10 H2 Name: Hingganite-(Y) Unit cell: 9.888 7.607 4.74 90.0 90.45 90.0 , V=356.52 Space group: P121/A1 (14)

Yakubovich O V , Matvienko E N , Voloshin A V , Simonov M A , Soviet Physics Crystallography , 28 (1983) p.269-271, The crystal structure of hingganite-(Yb), (Y0.51TR0.36Ca0.13)*Fe0.065Be[SiO4](OH), Locality: amazonite pegmatites, Kola peninsula, Russia