The rich crystal chemistry of theAMM′(PO₄)₂morphotropic series: NaZnAl(PO₄)₂, the first Na representative with a new structure type

Abstract

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 P2 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 [101] 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 0 PO 4 , where A = Na, K, Rb or NH 4 , M = Cu, Ni, Co, Fe, Zn or Mg and M 0 = 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. research papers Acta Cryst. (2019). C75, 514-522 Yakubovich et al. First Na representative with a new structure type 515 research papers 522 Yakubovich et al. First Na representative with a new structure type Acta Cryst. (2019). C75, 514-522 supporting information sup-1 Acta Cryst. (2019). C75, 514-522 supporting information Acta Cryst. (2019). C75, 514-522 [https://doi.

Joint crystallization of KCuAl[PO4]2 and K(Al,Zn)2[(P,Si)O4]2: crystal chemistry and mechanism of formation of phosphate-silicate epitaxial heterostructure

“…5(a)]. The minerals celsian, BaAl 2 Si 2 O 8 (Griffen & Ribbe, 1976), and filatovite, K(Al,Zn) 2 [(As,Si)O 4 ] 2 (Filatov et al, 2004), crystallize in the same structure type, as do a large group of phosphates with first-row transition metals and Al (Yakubovich et al, 2019). The structural feature of the isotypic natural and synthetic compounds of this family is the close topology of their cationic substructures to that of feldspars with the characteristic design of a 'crosslinked Jacob's ladder' (Taylor, 1933) (Fig.…”

“…Recently, we have analysed the crystal chemical diversity of isoformula phosphates AMM 0 [PO 4 ] 2 (A + = Na, K, Rb, NH 4 , M 2+ = Cu, Ni, Co, Fe, Zn, M 03+ = Fe, Al, Ga), including 18 representatives (Yakubovich et al, 2019). It has been shown that the rich crystal chemistry of the discussed morphotropic series (seven structure types) is due to the possibility of different coordination of M and M 0 atoms in the oxygen environment, from tetrahedral to octahedral, including five vertices, as well as to the size of alkali metal ions.…”

Synthesis and characterization of a novel alkali mixed magnesium-aluminum phosphate with a layered structure–KMgAl(PO4)2

“…The KCuAl(PO4)2 [15] and RbCuAl(PO4)2 [16] compounds exhibit 3D structures formed by CuO6 octahedrons sharing a common edge to form zigzag chains connected to a AlO5 polyhedron and PO4 tetrahedrons through corners and an edge. The compounds KCoAl(PO4)2 [17], NH4(Al,Co)2(PO4)2 [18], KZnAl(PO4)2 and β-NaZnAl(PO4)2 [19], (NH4)0,83(Zn0,83Al1,17)(PO4)2 [20] and α-NaZnAl(PO4)2 [21] adopted a 3D structural framework formed entirely by tetrahedrons.…”