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OH defects in synthetic xenotime (YPO (sub 4) )

Takeyasu Abe, Takahiro Kuribayashi and Michihiko Nakamura
OH defects in synthetic xenotime (YPO (sub 4) ) (in The 8 (super th) European conference on Mineralogy and spectroscopy, Giovanni Andreozzi (editor), Ferdinando Bosi (editor) and Francesco Di Benedetto (editor))
European Journal of Mineralogy (June 2016) 28 (3): 641-648

Abstract

The polarized infrared spectra of hydrogen-containing xenotime (YPO (sub 4) ) were measured to obtain information on its OH defects. Sample syntheses were conducted at 1.0 GPa using a piston-cylinder apparatus under water-saturated conditions. By lowering the temperature at a rate of 10 degrees C/h from 1200 to 800 degrees C, xenotime single crystals up to approximately 300 mu m in length were obtained. A sharp OH stretching vibrational band was observed at 3302 cm (super -1) . Using a molar absorption coefficient of 111 217 L mol (super -1) cm (super -2) , the H (sub 2) O concentration in the sample was estimated as 20+ or -10 ppm. The OH band showed strong infrared absorption perpendicular to the c-axis and weak absorption parallel to the c-axis. According to electrostatic considerations and assuming the presence of Y (super 3+) or P (super 5+) vacancy, possible orientations of the O-H bonds were estimated. We propose that the OH incorporation mechanism in synthetic xenotime is controlled by Y (super 3+) vacancy (Y (sub Y) <--> V (sub Y) = 3H (sub i) ).


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 28
Serial Issue: 3
Title: OH defects in synthetic xenotime (YPO (sub 4) )
Title: The 8 (super th) European conference on Mineralogy and spectroscopy
Author(s): Abe, TakeyasuKuribayashi, TakahiroNakamura, Michihiko
Author(s): Andreozzi, Giovannieditor
Author(s): Bosi, Ferdinandoeditor
Author(s): Di Benedetto, Francescoeditor
Affiliation: Tohoku University, Department of Earth Science, Sendai, Japan
Affiliation: Sapienza University of Rome, Rome, Italy
Pages: 641-648
Published: 201606
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Germany
Meeting name: 8th European conference on Mineralogy and spectroscopy
Meeting location: Rome, ITA, Italy
Meeting date: 20150909Sept. 9-11, 2015
References: 36
Accession Number: 2016-085342
Categories: Mineralogy of non-silicates
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201641
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