Dicerium orthosilicate selenide and dicerium orthosilicate telluride,Ce2(SiO4)Q (Q = Se or Te)

The crystal structures of two new quaternary compounds, viz. dicerium orthosilicate selenide and dicerium orthosilicate telluride, Ce₂(SiO₄)Q (Q = Se or Te), have been determined from single‐crystal X‐ray diffraction data. Each structure comprises infinite chains of SiO₄ tetrahedra separated by Ce and Q atoms. The site symmetries are Ce m and 2, Si 2 and Qm. The O atoms are in general positions.