Titre du document / Document title

Cluster self-organization of Na,Ti-silicate systems : Suprapolyhedral precursors and self-assembly of crystal structures of Na₂Ti₂Si₂O₉ (Ramzaite) and Na₂TiSiO₅ (Paranatisite)

Auteur(s) / Author(s)

ILYUSHIN G. D. ;

Résumé / Abstract

The initial stages of formation of precursor clusters are considered in an evolving system containing various types of polyhedra: T tetrahedra and M polyhedra (pyramids, octahedra, and others). A graph topological representation of the precursor clusters of different self-organization levels of a chemical system is given. The model has been applied to find precursor clusters for Na,Ti-silicates that crystallize in the Na-Ti-Si-O(H) systems. For ramzaite Na₂Ti₂Si₂O₉ (RAM) and a dimorph of natisite (NAT), namely, paranatisite Na₂TiSiO₅ (PNAT), computer techniques (the TOPOS 4.0 program package) have been used to perform the full 3D reconstruction of structure self-assembly: precursor cluster-primary chain-microlayer-microframework (suprapre-cursor). New types of eight-polyhedral ring precursor clusters have been identified. The packing specifics of precursor clusters in crystal-forming microlayers determine the platy habit of Na,Ti-silicate single crystals.

Revue / Journal Title

Russian journal of inorganic chemistry   ISSN 0036-0236   CODEN RJICAQ 

Source / Source

2006, vol. 51, n^o11, pp. 1783-1794 [12 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Springer, New York, NY, ETATS-UNIS  (1959) (Revue)

Localisation / Location

INIST-CNRS, Cote INIST : 9395, 35400014517230.0150