AM_Aeschynite-(Y)_2 Formula: Y.55 Ce.011 Pr.002 Nd.026 Sm.016 Gd.091 Dy.079 Er.034 Yb.022 Th.1 U.03 Ca.02 Ti1.81 Nb.09 Ta.01 W.11 O6 Name: Aeschynite-(Y) Unit cell: 10.904 7.49 5.189 90.0 90.0 90.0 , V=423.79 Space group: PNMA (62)

Bonazzi P , Menchetti S , European Journal of Mineralogy , 11 (1999) p.1043-1049, Crystal chemistry of aeschynite-(Y) from the Western Alps:, residual electron density on difference-Fourier map, Sample: TR2, Locality: western Alps