Structure and luminescence properties of silver-doped NaY(PO 3) 4 crystal

• Published in: Journal of solid state chemistry Vol. 181; no. 11; pp. 3078 - 3085
• Main Authors: El Masloumi, M., Jubera, V., Pechev, S., Chaminade, J.P., Videau, J.J., Mesnaoui, M., Maazaz, M., Moine, B.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 2008; Elsevier
• Subjects: Chemical Sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Crystal; Exact sciences and technology; Growth from melts; zone melting and refining; Inorganic compounds; Luminescence; Material chemistry; Materials science; Methods of crystal growth; physics of crystal growth; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Phosphate; Photoluminescence; Physics; Silver; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Silver; Phosphate; Luminescence; Crystal; Phosphates; Raman spectra; Long chain; Doping; Sodium Yttrium Phosphates; Gadolinium; Metaphosphates; Infrared spectra; Monoclinic lattices; Polyphosphates; Unit cell; Monocrystals; Sodium; Atomic arrangement; Silver Sodium Yttrium Phosphates; Yttrium; Erbium; Crystal growth from melts; Crystal structure
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2008.07.040

Single crystals of NaY(PO 3) 4 and Ag 0.07Na 0.93Y(PO 3) 4 have been synthesized by flux method. These new compounds turned out to be isostructural to Na Ln(PO 3) 4, with Ln=La, Nd, Gd and Er [monoclinic, P2 1/ n, a=7.1615(2) Å, b=13.0077(1) Å, c=9.7032 (3) Å, β=90.55 (1)°, V=903.86(14) Å 3 and Z=4]. The structure is based upon long polyphosphate chains running along the shortest unit-cell direction and made up of PO 4 tetrahedra sharing two corners, linked to yttrium and sodium polyhedra. Infrared and Raman spectra at room temperature confirms this atomic arrangement. The luminescence of silver ions was reported in metaphosphate of composition Ag 0.07Na 0.93Y(PO 3) 4. One luminescent centre was detected and assigned to single Ag + ions. The presence of only one Ag + luminescence centre is the result from the perfect isolation (Ag +–Ag +=5.90 Å) of each oxygenated silver site (AgO 8 polyhedra) sharing two faces and one corner with three yttrium polyhedra.