AM_Strontiopiemontite Formula: Ca1.05 Mn1.1 Sr.73 Si3 Al1.8 Fe.32 O13 H Name: Strontiopiemontite Unit cell: 8.849 5.671 10.203 90.0 114.63 90.0 , V=465.43 Space group: P121/M1 (11)

Bonazzi P , Menchetti S , Palenzona A , European Journal of Mineralogy , 2 (1990) p.519-523, Strontiopiemontite, a new member of the epidote group,, from Val Graveglia, Liguria, Italy, Sample: SRPM, Locality: Val Graveglia, Liguria, Italy