Citation: Bonazzi, P.; Menchetti, S.; Reinecke, T. (1996). Solid solution between piemontite and androsite-(La), a new mineral of the epidote group from Andros Island, Greece Sample: VA-1a. American Mineralogist, 81, pp. 735-742.
Formula: Al1.71 Ca0.96 Ce0.23 Cu0.13 Fe0.4 Gd0.01 H La0.11 Mg0.16 Mn0.93 Nd0.1 O13 Pr0.03 Si3 Sm0.02 Sr0.19 Th0.02
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al6 Ca4 Ce2 Cu2 Fe4 Gd2 H2 La2 Mg2 Mn6 Nd2 O26 Pr2 Si6 Sm2 Sr2 Th2 (Al3 Ca2 Ce Cu Fe2 Gd H La Mg Mn3 Nd O13 Pr Si3 Sm Sr Th)
Multiplicity: 1