AM_Peprossiite-(Ce) Formula: Pr.818 Ca.102 Al2 (B3.868 Si.132) O10.667 Name: Peprossiite-(Ce) Unit cell: 4.612 4.612 9.374 90.0 90.0 120.0 , V=172.68 Space group: P-62M (189)

Callegari A , Caucia F , Mazzi F , Oberti R , Ottolini L , Ungaretti L , American Mineralogist , 85 (2000) p.586-593, The crystal structure of peprossiite-(Ce), and anhydrous REE and Al mica-like borate, with square-pyramidal coordination for Al, Sample: Pep1