Crystal structure and luminescence properties of silver(I) doped polyphosphate NaZn(PO3)3

Phase relations and flux research for zinc oxide crystal growth in the ZnO–Na2O–P2O5 system

“…Na 2 ZnP 2 O 7 [29][30][31], NaZn(PO 3 ) 3 [32][33][34], Na 2 ZnP 4 O 12 [32], NaZnPO 4 [35,36], Na 3 ZnP 3 O 10 , [37] Na 9 Zn 21 (PO 4 ) 17 [38] and Na 9 Zn 3 (PO 4 ) 5 [38]. Na 2 ZnP 2 O 7 crystals were obtained by slowly cooling the molten stoichiometric mixtures of Na 2 CO 3 , ZnO and (NH 4 ) 2 HPO 4 in Ref.…”

“…The relation between the large and the small unit cell is that [31] reported that the space group of the Na 2 ZnP 2 O 7 compound was P4 2 /mnm with lattice parameters a = b = 7.687(5), c = 10.275(7)Å. NaZn(PO 3 ) 3 compound was reported to have the cubic symmetry with space group I43 d and lattice parameter a = 14.58Å [32], or with space group Pa3 and lattice parameter a = 14.2581(4)Å [33]. While Aouad [34] reported that it belonged to the orthorhombic system with space group Pbca and lattice parameters of a = 14.259 (2)…”

“…The powder diffraction data of the Na 2 Zn 5 (PO 4 ) 4 compound with Cu K␣ 2θ > 40 • was listed in Table 1, which can be used as a standard for phase analysis. The figures of merit of indexing by DICVOL program [43] were [34]. The space group of the NaZn(PO 3 ) 3 compound was reported as I43d and Pa3 in Refs.…”

Synthesis, crystal structure and vibrational spectra characterization of MILa(PO3)4 (MI=Na, Ag)

“…Research undertaken the latter years in our laboratory has shown the relationships between the structure and the luminescent properties of the silver ion in the condensed phosphates Na 1−x Ag x M(PO 3 ) 3 (M=Mg, Zn, Ba) [1] and [2] and in the diphosphates Na 2−x Ag x ZnP 2 O 7 [3] and [4] where the two luminescent centres (single Ag + and Ag + -Ag + pairs) have been correlated with the symmetry of the silver sites and with the ionocovalent character of the Ag + -O bonds. In the same way, much works about other families of condensed phosphates with general formula M I M III (PO 3 ) 4 (where M I is an alkali cation, Ag [5] and [6]) and M III is a rareearth trivalent cation [7], [8], [9] and [10], Bi [11] and [12] or Y [13] and [14] were published mainly for their optical properties.…”

Structural Analysis of a Melaminium Polyphosphate from X-ray Powder Diffraction and Solid-State NMR Data

“…Angular ranges for O-P-O (102.7-120.6°) and P-O-P (134.2°) angles are also in a good agreement with those usually found in polyphosphate anions. [25][26][27][28][29][30][31]46 Figure 5 shows the 31 P CP MAS spectra of MPoly at two different sample spinning frequencies, (a) 4 kHz and (b) 12 kHz. A Herzfeld-Berger analysis 47 of the sideband pattern in Figure 6a for the phosphorus PO 3 sites in MPoly results in a chemical shift anisotropy (CSA) of (δ 11 , δ 22 , δ 33 ) ) (78, 17, -172) ( 1 ppm, which is in good agreement with literature data for PO 3 sites in polyphosphate salts.…”