The Structure and Luminescent Properties of TlZn(PO3)3

✍ Scribed by A. El Abiad; B. Es-Sakhi; M. Mesnaoui; M. Maazaz; I. Belharouak; P. Gravereau; C. Parent; G. Wallez; G.Le Flem

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 249 KB
• Volume: 154
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8898

✦ Synopsis

The crystal structure and the luminescent properties of TlZn(PO 3 ) 3 are studied with respect to Tl ؉ stereochemistry. In this polyphosphate the Tl ؉ ions are located in tunnels created by the zinc polyphosphate network [Zn(PO 3 ) 3 ]. Actually the thallium atoms are found in a disymmetric con5guration and bond calculation allows the determination of the coordination number by oxygen: 6. Nevertheless a large Tl+O distance induces a low stereochemical activity of the 6s 2 lone pair. The luminescent properties are analyzed in the context of Fukuda:s model. Thermal variations of excitation and emission spectra can be explained by the small in6uence of the electron+lattice interaction in agreement with the thallium environment.