AM_Hingganite-(Yb)
Formula: (Y1.02 Yb.72 Ca.26) Fe.13 Be2 Si2 O10 H2
Name: Hingganite-(Yb)
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 , Matvinenko E N , Voloshin A V , Simonov M A , Kristallografiya , 28 (1983) p.457-460, The crystal structure of hingganite-(Yb), (Y0.51Yb0.36Ca0.13)Fe0.065Be[SiO4](OH)