Cationic (Metallic) Memory in Double Condensed Phosphates:
Metals LnOxides Ln₂O₃Phosphates MLn(PO₃)₄ and MLnP₄O₁₂

G. A. Bandurkin, N. N. Chudinova, K. K. Palkina, G. M. Balagina, and M. G. Komova

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia

Received September 27, 2007

Abstract—The cationic networks that fix the distribution of cations in planar sections parallel to basis planes
of the unit cell of crystal structures have been studied. Topologically identical cationic networks have been
shown to be the carriers of deep structure-forming “memory” that successively relates the structures of rare
earth metals (La ST) and oxides Ln₂O₃ (- and -Ln₂O₃ ST) to the structures of double condensed phosphates
MLn(PO₃)₄ and MLnP₄O₁₂.

DOI: 10.1134/S0036023608070176

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