Acta Cryst. (2005). E61, i76-i78  [ doi:10.1107/S1600536805011049 ]

Dicerium disilicate, Ce₂[Si₂O₇]

B. Deng and J. A. Ibers

Abstract: Dicerium disilicate, Ce₂[Si₂O₇], crystallizes in space group P4₁ of the tetragonal system. It has isostructural analogues among the disilicates of the larger rare-earth elements, namely Ln₂[Si₂O₇] (Ln is La, Pr, Nd or Sm). The structure consists of discrete Ce³⁺ cations and [Si₂O₇]^6- anions; the asymmetric unit containing four cations and two anions. Each anion is formed from two SiO₄ tetrahedra that share a vertex.

Online 23 April 2005

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