A new europium(III) silicophosphate, whose formula may be considered to be Eu2Si(PO4)2(P2O7), has been found to consist of phosphosilicate chains with Si-O-P-O-P-O-Si backbones extending in the a direction. The P2O7 group and the Si atom both lie on crystallographic twofold axes. Tetrahedral silicon is further bound to two monophosphate groups. This is a silicophosphate of previously unseen type.