Raman study of tetragonal TbPO4 and observation of a first-order phase transition at high pressure

Tatsi, A; Stavrou, E; Boulmetis, YC; Kontos, AG; Raptis, YS; Raptis, C

dc.contributor.author	Tatsi, A	en
dc.contributor.author	Stavrou, E	en
dc.contributor.author	Boulmetis, YC	en
dc.contributor.author	Kontos, AG	en
dc.contributor.author	Raptis, YS	en
dc.contributor.author	Raptis, C	en
dc.date.accessioned	2014-03-01T01:29:04Z
dc.date.available	2014-03-01T01:29:04Z
dc.date.issued	2008	en
dc.identifier.issn	0953-8984	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19114
dc.subject	First-order Phase Transition	en
dc.subject	High Pressure	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Crystal structure	en
dc.subject.other	Crystal symmetry	en
dc.subject.other	Diamonds	en
dc.subject.other	High pressure engineering	en
dc.subject.other	Powders	en
dc.subject.other	Silicate minerals	en
dc.subject.other	Zircon	en
dc.subject.other	Active modes	en
dc.subject.other	Ambient conditions	en
dc.subject.other	Ambient pressures	en
dc.subject.other	Diamond anvils	en
dc.subject.other	First orders	en
dc.subject.other	High pressures	en
dc.subject.other	Oriented crystals	en
dc.subject.other	Raman modes	en
dc.subject.other	Raman peaks	en
dc.subject.other	Raman spectrums	en
dc.subject.other	Raman studies	en
dc.subject.other	Space groups	en
dc.subject.other	Phase transitions	en
dc.title	Raman study of tetragonal TbPO4 and observation of a first-order phase transition at high pressure	en
heal.type	journalArticle	en
heal.identifier.primary	10.1088/0953-8984/20/42/425216	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0953-8984/20/42/425216	en
heal.identifier.secondary	425216	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The Raman spectra of tetragonal TbPO4 (zircon-type I4 1/amd structure, D4h19 space group) have been measured at ambient conditions and under variable pressure up to 15.5GPa inside a diamond anvil cell (DAC). Assignment of the Raman active modes of the tetragonal phase has been carried out based on polarized measurements from a single oriented crystal of TbPO4 at ambient conditions. The abrupt Raman mode discontinuities and the appearance of numerous new Raman peaks at a pressure Pc≈9.5GPa have provided strong evidence for a first-order phase transition to a lower crystal symmetry, most likely monoclinic. The high-pressure structure appears to be more compact compared to the tetragonal one, and is retained upon bringing the crystal to ambient pressure. © 2008 IOP Publishing Ltd.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	Journal of Physics Condensed Matter	en
dc.identifier.doi	10.1088/0953-8984/20/42/425216	en
dc.identifier.isi	ISI:000259693700023	en
dc.identifier.volume	20	en
dc.identifier.issue	42	en