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The rich crystal chemistry of the AMM ′(PO 4 ) 2 morphotropic series: NaZnAl(PO 4 ) 2 , the first Na representative with a new structure type
Author(s) -
Yakubovich Olga,
Kiriukhina Galina,
Volkov Anatoliy,
Dimitrova Olga
Publication year - 2019
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229619004327
Subject(s) - crystallography , monoclinic crystal system , crystal structure , tetrahedron , crystal chemistry , chemistry , crystal (programming language) , octahedron , hydrothermal synthesis , hydrothermal circulation , materials science , geology , seismology , computer science , programming language
A novel phosphate, sodium zinc aluminium bis(phosphate), NaZnAl(PO 4 ) 2 , was obtained under mild‐temperature hydrothermal conditions at 553 K. The crystal structure has been studied using single‐crystal X‐ray experimental data. The pseudo‐hexagonal phase NaZnAl(PO 4 ) 2 crystallizes in the monoclinic space group P 2 1 / c . Its unique crystal structure is based on a three‐dimensional (3D) framework built by Zn‐, Al‐ and P‐centred tetrahedra sharing vertices. Channels parallel to the [101] and [01] directions are limited by six‐ and eight‐membered windows, and incorporate Na atoms. The new compound is discussed as a member of the morphotropic series AMM ′PO 4 , where A = Na, K, Rb or NH 4 , M = Cu, Ni, Co, Fe, Zn or Mg and M ′ = Fe, Al or Ga. The title compound is the first Na representative within the series and is characterized by a 3D architecture of tetrahedra populated in an ordered manner by Zn 2+ , Al 3+ and P 5+ ions.