@article{JRC33556,
	address = {},
	year = {2006},
	author = {Geisler T and Popa K and Konings R and Popa A},
	abstract = {We have studied the structural evolution of monoclinic BaZr(PO4)2 during heating up to 835K by Raman spectroscopy. In agreement with previous studies we found a first-order phase transition at about 730K during heating while upon cooling the reverse transition occurs at 705 K. However, some disagreement about the crystal structure of the high-temperature polymorph occurs in the literature. While the space group has not yet been determined, the X-ray diffraction pattern of the high-temperature phase has been indexed on either an orthorhombic or a hexagonal unit cell. We found that the number of Raman active internal PO4 vibrational modes decrease from nine to six during the transition. A group theoretical survey through all orthorhombic, trigonal, and hexagonal factor groups revealed that the observed number of vibrations would only be consistent with the Ba and Zr atoms located at a D3d ð¯3mÞ site, the P and two O atoms at a C3v(3m), and six O atoms at a Cs(m) site in the D3d factor group. 
		
		
		
		},
	title = {A Raman Spectroscopic Study of the Phase Transistion of BaZr(PO4)2 - Evidence for a Triginal Structure of the High-temperature Polymorph. },
	type = {},
	url = {},
	volume = {179},
	number = {},
	journal = {JOURNAL OF SOLID STATE CHEMISTRY},
	pages = {1490-1496},
	issn = {},
	publisher = {ELSEVIER SCI LTD},
	doi = {10.1016/j.jssc.2006.01.065