Podrobnosti záznamu

Název
    Synthesis and crystal structure of the feldspathoid CsAlSiO4: An open-framework silicate and potentil nuclear waste disposal pahse
Další názvy
    Syntéza a krystalová struktura CsAlSiO4
Autor
    Drábek, Milan
    Gatta, D.
    Klaska, R.
    Rieder, Milan
    Rotiroti, N.
    Weiss, Z.
    Zanazzi, P.
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    The American Mineralogist
Svazek/č.
    Roč. 93, č. 7/2008
Strany
    8
Rok
    2008
Výraz tezauru
    crystal structure, feldspathoid, open-framework silicate, Cs
Klíčové slovo
    Crystal
    CsAlSiO4
    Disposal
    Feldspathoid
    Nuclear
    Open-framework
    Pahse
    Potentil
    Silicate
    Structure
    Synthesis
    Waste
Abstrakt (česky)
   Crystalline CsAlSiO4 was synthesized from a stoichiometric mixture of Al2O3 + SiO2 + Cs2O (plus excess water). The crystal structure of the CsAlSiO4 feldspathoid is built on an ABW framework type, showing a fully ordered Si/Al-distribution in the tetrahedral framework. The only extra-framework site is occupied by Cs, lying off-center in the 8mR-channels. CsAlSiO4 is more likely to retain Cs when immersed in a fluid phase, relative to several other Cs-bearing zeolites. The topological configuration of the Cs-polyhedron (and its bonding environment), the small dimension of the pores and the high flexibility of the ABW framework type would imply a better thermal and elastic stability of CsAlSiO4 than those of the zeolitic Cs-aluminosilicates. In this light, CsAlSiO4 can be considered as a functional material potentially usable for fixation and deposition of radioactive isotopes of Cs..
Abstrakt (anglicky)
   Crystalline CsAlSiO4 was synthesized from a stoichiometric mixture of Al2O3 + SiO2 + Cs2O (plus excess water). The crystal structure of the CsAlSiO4 feldspathoid is built on an ABW framework type, showing a fully ordered Si/Al-distribution in the tetrahedral framework. The only extra-framework site is occupied by Cs, lying off-center in the 8mR-channels. CsAlSiO4 is more likely to retain Cs when immersed in a fluid phase, relative to several other Cs-bearing zeolites. The topological configuration of the Cs-polyhedron (and its bonding environment), the small dimension of the pores and the high flexibility of the ABW framework type would imply a better thermal and elastic stability of CsAlSiO4 than those of the zeolitic Cs-aluminosilicates. In this light, CsAlSiO4 can be considered as a functional material potentially usable for fixation and deposition of radioactive isotopes of Cs..
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
    R
Datum importu
    15. 10. 2014