Citation: Kampf, A. R.; Housley, R. M. (2015). Chiappinoite-(Y), Y2Mn(Si3O7)4, a new layer silicate found in peralkaline syenitic ejecta from the Agua de Pau volcano, Azores. European Journal of Mineralogy, 27, pp. 91-97.
Formula: Ca0.25 Ce0.18 Dy0.1 Er0.08 Fe0.09 Gd0.07 La0.07 Mn0.61 Na0.1 Nd0.09 O28 Pr0.02 Si12 Sm0.03 Y1.17 Yb0.06
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Ca4 Ce8 Dy8 Er8 Fe4 Gd8 La8 Mn4 Na8 Nd8 O112 Pr8 Si48 Sm8 Y8 Yb8 (Ca Ce2 Dy2 Er2 Fe Gd2 La2 Mn Na2 Nd2 O28 Pr2 Si12 Sm2 Y2 Yb2)