Citation: Guastoni, A.; Camara, F.; Nestola, F. (2010). Arsenic-rich fergusonite-beta-(Y) from Mount Cervandone (Western Alps, Italy): Crystal structure and genetic implications. American Mineralogist, 95, pp. 487-494.
Formula: As0.27 Ca0.05 Dy0.07 Er0.05 Gd0.02 Nb0.68 Nd0.01 O4 Si0.01 Ta0.01 Tb0.01 Th0.01 U0.02 W0.06 Y0.7 Yb0.01
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: As4 Ca4 Dy4 Er4 Gd4 Nb4 Nd4 O16 Si4 Ta4 Tb4 Th4 U4 W4 Y4 Yb4 (As Ca Dy Er Gd Nb Nd O4 Si Ta Tb Th U W Y Yb)
Multiplicity: 1