Reinvestigation of the GdP5O14 crystal structure at room temperature and magnetic properties

Energy transfers between Sm3+ and Eu3+ in YPO4, LaP5O14 and LaP3O9 phosphates. Potential quantum cutters for red emitting phosphors

“…It is known from the classical Foster-Dexter theory of energy transfer between two electrostatically interacting entities [19,20], that the efficiency of energy transfer depends critically on the distance between donor and acceptor ions and on the overlap factor. The minimal distance between rare earth ions in these matrices is equal to 0.3755 nm in YPO 4 [21], while it is 0.4315 nm [22] and 0.5246 nm [23] in LaP 3 O 9 and LaP 5 O 14 , respectively. Taking into account the fact that the transfer probability, in the case of dipole-dipole interaction, is proportional to D À 6 (D being the donor-acceptor distance), it means that the probability should be almost 10 times greater Fig.…”

“…[18,[21][22][23]28,29]. Owing to the experimental conditions explained before it is difficult to see, in excitation spectra, if a cross-relaxation energy transfer actually occurs between Sm 3 + and Eu 3 + (step 2 in Fig.…”

Topological Analysis of Void Space in Phosphate Frameworks: Assessing Storage Properties for the Environmentally Important Guest Molecules and Ions: CO2, H2O, UO2, PuO2, U, Pu, Sr2+, Cs+, CH4, and H2

“…Representative example of a crystal structure (of Gd­(P 5 O 14 ) [ICSD ref 156410]) bearing the most common ( n = 5) n -nodal net among experimentally determined structures that contains cages with suitable void space volumes (black/gray) to accommodate PuO 2 .…”

A sodium gadolinium phosphate with two different types of tunnel structure: Synthesis, crystal structure, and optical properties of Na3GdP2O8

“…Recently, our group reported compounds LiGd 5 P 2 O 13 which consists of isolated PO 4 tetrahedra linked with Ga polyhedra and Li + cations are located in the infinite tunnels, and K 3 Gd 5 (PO 4 ) 6 in which the structural units of Gd polyhedra and isolated PO 4 tetrahedra form a three-dimensional framework containing infinite tunnels in which the K + cations are located [7,8]. In addition, only several condensed polyphosphates containing Gd in ternary system have been reported [9][10][11][12][13][14][15]. For the type of MGd(PO 3 ) 4 compounds (M ¼ Na, K, Cs, and Ag), the basic structure units are helical ribbons (PO 3 ) n formed by cornersharing PO 4 tetrahedra.…”

“…In view of the unusual compositional and structural diversity of phosphate compounds with gadolinium and they are potential applications in ultraviolet emission [7,8], magnetic [15], and nonlinear optical materials [16], we have continually designed and synthesized new compounds with fascinating properties in the system. In this paper, we will describe the synthesis, crystal structure, and optical properties of Na 3 GdP 2 O 8 by single-crystal Xray diffraction (XRD), powder XRD, and absorption and emission spectra.…”