Abstract
A new zirconosilicate of chemical formula Na2Zr7Si2.5O20·3H2O and its K and Ba ion-exchanged forms are characterized by means of X-ray diffraction, TG-DTA and HRTEM analyses. Preliminary information about space group and unit cell parameters is reported. The structural peculiarities of the studied compound are compared with those of other previously reported zirconium compounds, with similar powder diffraction patterns and unknown crystal structures. An arrangement of the zirconium polyhedra within the crystal structure of these materials is proposed.
