AM_Piemontite_3 Formula: Ca.96 Mn.93 Th.02 Sr.19 La.11 Ce.23 Pr.03 Nd.1 Sm.02 Gd.01 Si3 Fe.4 Al1.71 Mg.16 Cu.13 H O13 Name: Piemontite Unit cell: 8.89 5.69 10.135 90.0 114.44 90.0 , V=466.73 Space group: P121/M1 (11)

Bonazzi P , Menchetti S , Reinecke T , American Mineralogist , 81 (1996) p.735-742, Solid solution between piemontite and androsite-(La), a new mineral of the, epidote group from Andros Island, Greece, Sample: VA-1a