Crystal Structure and Thermal Decomposition Studies of Barium Borophosphate, BaBPO5

✍ Scribed by Ying Shi; Jingkui Liang; Hao Zhang; Quanlin Liu; Xiaolong Chen; Jinling Yang; Weidong Zhuang; Guanghui Rao

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 420 KB
• Volume: 135
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1997.7588

✦ Synopsis

The crystal structure and thermal decomposition process of barium borophosphate BaBPO 5 have been studied by a combination of X-ray powder diffraction (XRD) and vibration spectroscopic techniques. The structure of BaBPO 5 is refined by Rietveld technique, which indicates that the structure units of this compound are PO 4 and BO 4 tetrahedra as well as irregular rare earth polyhedra. The thermal decomposition process of BaBPO 5 have been observed by the XRD patterns of decomposition samples under a series of heat treatments. The Raman and infrared spectra of the initial compound BaBPO 5 and its decomposed products Ba 3 BP 3 O 12 and Ba 2 P 2 O 7 showed the variations of the anion groups of boron and phosphorus. Assignments have been deduced from the systematic investigation of natural compounds and isotopic species with the help of isotopic shift data of 10 B -11 B.