Phase Transitions in Natural Vanadinite at High Pressures

The structural stability of vanadinite, Pb5[VO4]3Cl, is reported by high-pressure experiments using synchrotron radiation X-ray diffraction (XRD) and Raman spectroscopy. XRD experiments were performed up to 44.6 GPa and 700 K using...

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Autores principales:	Yingxin Liu, Liyun Dai, Xiaojing Lai, Feng Zhu, Dongzhou Zhang, Yi Hu, Sergey Tkachev, Bin Chen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	X-ray diffraction Raman spectroscopy high pressure and high temperature apatite group Mineralogy QE351-399.2
Acceso en línea:	https://doaj.org/article/4b7f339d412c4694ab19d71f93591f41
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id	oai:doaj.org-article:4b7f339d412c4694ab19d71f93591f41
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spelling	oai:doaj.org-article:4b7f339d412c4694ab19d71f93591f412021-11-25T18:26:21ZPhase Transitions in Natural Vanadinite at High Pressures10.3390/min111112172075-163Xhttps://doaj.org/article/4b7f339d412c4694ab19d71f93591f412021-10-01T00:00:00Zhttps://www.mdpi.com/2075-163X/11/11/1217https://doaj.org/toc/2075-163XThe structural stability of vanadinite, Pb<sub>5</sub>[VO<sub>4</sub>]<sub>3</sub>Cl, is reported by high-pressure experiments using synchrotron radiation X-ray diffraction (XRD) and Raman spectroscopy. XRD experiments were performed up to 44.6 GPa and 700 K using an externally-heated diamond anvil cell (EHDAC), and Raman spectroscopy measurements were performed up to 26.8 GPa at room temperature. XRD experiments revealed a reversible phase transition of vanadinite at 23 GPa and 600 K, which is accompanied by a discontinuous volume reduction and color change of the mineral from transparent to reddish during compression. The high-pressure Raman spectra of vanadinite show apparent changes between 18.0 and 22.8 GPa and finally become amorphous at 26.8 GPa, suggesting structural transitions of this mineral upon compression. The structural changes can be distinguished by the emergence of a new vibrational mode that can be attributed to the distortion of [VO<sub>4</sub>] and the larger distortion of the V–O bonds, respectively. The [VO<sub>4</sub>] internal modes in vanadinite give isothermal mode Grüneisen parameters varying from 0.149 to 0.286, yielding an average VO<sub>4</sub> internal mode Grüneisen parameters of 0.202.Yingxin LiuLiyun DaiXiaojing LaiFeng ZhuDongzhou ZhangYi HuSergey TkachevBin ChenMDPI AGarticleX-ray diffractionRaman spectroscopyhigh pressure and high temperatureapatite groupMineralogyQE351-399.2ENMinerals, Vol 11, Iss 1217, p 1217 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	X-ray diffraction Raman spectroscopy high pressure and high temperature apatite group Mineralogy QE351-399.2
spellingShingle	X-ray diffraction Raman spectroscopy high pressure and high temperature apatite group Mineralogy QE351-399.2 Yingxin Liu Liyun Dai Xiaojing Lai Feng Zhu Dongzhou Zhang Yi Hu Sergey Tkachev Bin Chen Phase Transitions in Natural Vanadinite at High Pressures
description	The structural stability of vanadinite, Pb<sub>5</sub>[VO<sub>4</sub>]<sub>3</sub>Cl, is reported by high-pressure experiments using synchrotron radiation X-ray diffraction (XRD) and Raman spectroscopy. XRD experiments were performed up to 44.6 GPa and 700 K using an externally-heated diamond anvil cell (EHDAC), and Raman spectroscopy measurements were performed up to 26.8 GPa at room temperature. XRD experiments revealed a reversible phase transition of vanadinite at 23 GPa and 600 K, which is accompanied by a discontinuous volume reduction and color change of the mineral from transparent to reddish during compression. The high-pressure Raman spectra of vanadinite show apparent changes between 18.0 and 22.8 GPa and finally become amorphous at 26.8 GPa, suggesting structural transitions of this mineral upon compression. The structural changes can be distinguished by the emergence of a new vibrational mode that can be attributed to the distortion of [VO<sub>4</sub>] and the larger distortion of the V–O bonds, respectively. The [VO<sub>4</sub>] internal modes in vanadinite give isothermal mode Grüneisen parameters varying from 0.149 to 0.286, yielding an average VO<sub>4</sub> internal mode Grüneisen parameters of 0.202.
format	article
author	Yingxin Liu Liyun Dai Xiaojing Lai Feng Zhu Dongzhou Zhang Yi Hu Sergey Tkachev Bin Chen
author_facet	Yingxin Liu Liyun Dai Xiaojing Lai Feng Zhu Dongzhou Zhang Yi Hu Sergey Tkachev Bin Chen
author_sort	Yingxin Liu
title	Phase Transitions in Natural Vanadinite at High Pressures
title_short	Phase Transitions in Natural Vanadinite at High Pressures
title_full	Phase Transitions in Natural Vanadinite at High Pressures
title_fullStr	Phase Transitions in Natural Vanadinite at High Pressures
title_full_unstemmed	Phase Transitions in Natural Vanadinite at High Pressures
title_sort	phase transitions in natural vanadinite at high pressures
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4b7f339d412c4694ab19d71f93591f41
work_keys_str_mv	AT yingxinliu phasetransitionsinnaturalvanadiniteathighpressures AT liyundai phasetransitionsinnaturalvanadiniteathighpressures AT xiaojinglai phasetransitionsinnaturalvanadiniteathighpressures AT fengzhu phasetransitionsinnaturalvanadiniteathighpressures AT dongzhouzhang phasetransitionsinnaturalvanadiniteathighpressures AT yihu phasetransitionsinnaturalvanadiniteathighpressures AT sergeytkachev phasetransitionsinnaturalvanadiniteathighpressures AT binchen phasetransitionsinnaturalvanadiniteathighpressures
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Phase Transitions in Natural Vanadinite at High Pressures

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