干旱区生态环境知识资源中心(Arid): Spectroscopic and structural investigations of blue afwillite from Ma'ale Adummim locality, Palestinian Autonomy

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DOI	10.1016/j.saa.2019.117688
	Spectroscopic and structural investigations of blue afwillite from Ma'ale Adummim locality, Palestinian Autonomy
	Juroszek, Rafal 1; Czaja, Maria 1; Lisiecki, Radoslaw 2; Kruger, Biljana 3; Hachula, Barbara 4; Galuskina, Irina 1
通讯作者	Juroszek, Rafal
来源期刊	SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
ISSN	1386-1425
EISSN	1873-3557
出版年	2020
卷号	227
英文摘要	Until now, only the colourless crystals of mineral afwillite, Ca-3(HSiO4)(2)center dot 2H(2)O, were known from several localities around the world. Present work focuses on blue afwillite counterparts from the Ma'ale Adummim locality in Palestine. Using the wide spectrum of analytical methods we attempted to identify the causes of this unusual colour. Structural investigation confirms the presence of two tetrahedral SiO3OH units connected by hydrogen bonds. The Raman spectrum of afwillite, obtained for the first time, shows the increased number of bands in the range of 785-970 cm(-1), whose assignation was correlated with the presence of two different kinds of structural units: (SiO3OH)(3-) and its deprotonated counterpart (SiO4)(4-). The heating process at 250 degrees C, in addition to the colour changes from blue to pastel green, shows the intensity reduction and disappearing of some Raman bands attributed mainly to SiO3OH units. The IR investigation confirms also the presence of that unit and provides information that the position and designation of infrared bands above similar to 2300 cm(-1) is related to the strength of hydrogen bonds within the structure. The stretching and bending OH vibrations of afwillite sample show the partial shift to the lower spectral frequencies after the H/D isotopic exchange in OH or H2O groups. Based on the results of the electron absorption and luminescence analyses it has been proposed that the blue colour of afwillite is caused by hole oxygen defect, most probably SiQ(3)(-). (C) 2019 The Authors. Published by Elsevier B.V.
英文关键词	Afwillite Crystal structure Raman/IR spectroscopy Luminescence SiO3- hole centre
类型	Article
语种	英语
国家	Poland ; Austria
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000504050600074
WOS关键词	MOTTLED ZONE ; NEGEV DESERT ; SILICATE-GLASSES ; NATURAL ANALOG ; HATRURIM BASIN ; RAMAN-SPECTRA ; MINERALS ; POLDERVAARTITE ; OLMIITE ; CENTERS
WOS类目	Spectroscopy
WOS研究方向	Spectroscopy
EI主题词	2020-02-15
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312869
作者单位	1.Univ Silesia, Inst Earth Sci, Fac Nat Sci, Bedzinska 60, PL-41205 Sosnowiec, Poland; 2.Polish Acad Sci, Inst Low Temp & Struct Res, Okolna 2, PL-50422 Wroclaw, Poland; 3.Univ Innsbruck, Inst Mineral & Petrog, Innrain 52, A-6020 Innsbruck, Austria; 4.Univ Silesia, Inst Chem, Szkolna 9, PL-40006 Katowice, Poland
推荐引用方式 GB/T 7714	Juroszek, Rafal,Czaja, Maria,Lisiecki, Radoslaw,et al. Spectroscopic and structural investigations of blue afwillite from Ma'ale Adummim locality, Palestinian Autonomy[J],2020,227.
APA	Juroszek, Rafal,Czaja, Maria,Lisiecki, Radoslaw,Kruger, Biljana,Hachula, Barbara,&Galuskina, Irina.(2020).Spectroscopic and structural investigations of blue afwillite from Ma'ale Adummim locality, Palestinian Autonomy.SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,227.
MLA	Juroszek, Rafal,et al."Spectroscopic and structural investigations of blue afwillite from Ma'ale Adummim locality, Palestinian Autonomy".SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 227(2020).