AM_Bearthite Formula: Ca2 Al P2 O9 H Name: Bearthite Unit cell: 7.231 5.734 8.263 90.0 112.57 90.0 , V=316.37 Space group: P121/M1 (11)

Chopin C , Brunet F , Gebert W , Medenbach O , Tillmanns E , Schweizerische Mineralogische und Petrographische Mitteilungen , 73 (1993) p.1-9, Bearthite, Ca2Al[PO4]2(OH), a new mineral from high-pressure terranes of the, western Alps, Locality: Dora Maira massif, western Alps, Italy