Crystal Structure and Luminescence Properties of Silver in AgM(PO3)3 (M=Mg, Zn, Ba) Polyphosphates

✍ Scribed by I. Belharouak; H. Aouad; M. Mesnaoui; M. Maazaz; C. Parent; B. Tanguy; P. Gravereau; G.Le Flem

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 249 KB
• Volume: 145
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1999.8227

✦ Synopsis

The relationships between the crystal structures and the luminescent properties of the AgM(PO 3 ) 3 (M ‫؍‬ Mg, Zn, Ba) polyphosphates are reported in comparison with those of AgPO 3 . The structure of the magnesium and zinc phosphates is characterized by long polyphosphates chains connected to in5nite chains of [AgO 6 ] and [MO 6 ] polyhedra sharing faces. The basic structural phosphate unit in AgBa(PO 3 ) 3 is a P 3 O 9 ring. Silver atoms are located in distorted octahedral sites. Two types of luminescent centers have been observed. The UV emission observed in all these materials is typical of isolated Ag ؉ ions. The visible emission observed only in the zinc phosphate is probably the result of a silver+zinc association.