X-Ray Diffraction and Vibrational Spectroscopic Characteristics of Hydroxylclinohumite from Ruby-Bearing Marbles (Luc Yen District, Vietnam)
Joint Authors
Wierzbicka-Wieczorek, M.
Thomas, R.
Pentrák, M.
Luptáková, J.
Hurai, V.
Huraiová, M.
Swierczewska, A.
Source
International Journal of Mineralogy
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-01-29
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Earth Science , Water and Environment
Abstract EN
A honey-yellow hydroxylclinohumite from ruby-bearing marbles of the Luc Yen district in northern Vietnam was characterized by electron microprobe (EPMA), single-crystal X-ray diffraction (XRD), micro-Raman, and Fourier-transform infrared (FTIR) spectroscopy.
The studied crystals correspond to nearly ideal clinohumite with the structural formula 4[Mg2SiO4]·[(Mg,Fe,Ti)(OH,F)2] and roughly equal F and OH proportions.
Crystal structure analysis showed Ti substitution for Mg only at the Mg3 site.
A Fourier-difference map revealed one hydrogen site associated with ninth oxygen atom.
The calculated O–H bond distance was shorter than that in other natural clinohumites.
FTIR revealed bands corresponding to combination of OH-stretching with Mg–OH and/or Fe–OH bending modes, combinations of OH− and Fe–OH vibrations, combination of fundamental bands of the Si–OH bonding, combination of OH− and Si–OH vibrations, and first (2νOH) and the second (3νOH) overtones of the OH-stretching vibration mode.
Two groups of OH-stretching vibration and FTIR absorption bands at 3390–3420 cm−1 and 3560–3580 cm−1 show reversible temperature-dependent shift.
The low-frequency bands absent in pure synthetic hydroxylclinohumites are assigned to OH-planar defects caused by Ti-for-Mg substitution.
American Psychological Association (APA)
Hurai, V.& Wierzbicka-Wieczorek, M.& Pentrák, M.& Huraiová, M.& Thomas, R.& Swierczewska, A.…[et al.]. 2014. X-Ray Diffraction and Vibrational Spectroscopic Characteristics of Hydroxylclinohumite from Ruby-Bearing Marbles (Luc Yen District, Vietnam). International Journal of Mineralogy،Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-488043
Modern Language Association (MLA)
Hurai, V.…[et al.]. X-Ray Diffraction and Vibrational Spectroscopic Characteristics of Hydroxylclinohumite from Ruby-Bearing Marbles (Luc Yen District, Vietnam). International Journal of Mineralogy No. 2014 (2014), pp.1-11.
https://search.emarefa.net/detail/BIM-488043
American Medical Association (AMA)
Hurai, V.& Wierzbicka-Wieczorek, M.& Pentrák, M.& Huraiová, M.& Thomas, R.& Swierczewska, A.…[et al.]. X-Ray Diffraction and Vibrational Spectroscopic Characteristics of Hydroxylclinohumite from Ruby-Bearing Marbles (Luc Yen District, Vietnam). International Journal of Mineralogy. 2014. Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-488043
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-488043