AM_Piergorite-(Ce)
Formula: Ca8.6 Ce1.1 Th.3 (Al.49 Fe.35 Ti.16) Be.54 Li.3 Si6 B8 O37.76 (F.24 H1.76)
Name: Piergorite-(Ce)
Unit cell: 28.097 4.777 10.236 90.0 96.81 90.0 , V=1364.18
Space group: P12/A1 (13)

Boiocchi M , Callegari A , Ottolini L , American Mineralogist , 91 (2006) p.1170-1177, The crystal structure of piergorite-(Ce),, Ca8Ce2(Al0.5Fe3+0.5)Sum1(X,Li,Be)2Si6B8O36(OH,F)2:, A new borosilicate from Vetralla, Italy,, with a modified hellandite-type chain, Locality: Vetralla, Italy