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DOI	10.1016/j.matchemphys.2019.02.048
	Investigation of silica polymorphs stratified in siliceous geode using FTIR and XRD methods
	Awadh, Salih Muhammad 1; Yaseen, Zaher Mundher 2
通讯作者	Yaseen, Zaher Mundher
来源期刊	MATERIALS CHEMISTRY AND PHYSICS
ISSN	0254-0584
EISSN	1879-3312
出版年	2019
卷号	228 页码:45-50
英文摘要	The study aims to differentiate the silica forms stratified in the siliceous geodes using infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The water content (total water, H2Omol and Si-OH) in SiO2 center dot nH(2)O forms are used as the fingerprint for the different varieties of the silica morphs. For this reason, an irregular botryoidal spherical shape siliceous geode formed from alternative silica forms collected from Early-Late Eocene carbonate sediments of the Ratga Formation located in the Western Desert of Iraq were mineralogically investigated. The FTIR and XRD as authoritative tools that have been used together with the water content to enhance the distinction between crystalline and non-crystalline silica forms. Quartzine, quartz, chalcedony opal-A, opal-C, and opal-CT have been identified in different layers of geode in addition to calcite lining the geode center.
英文关键词	Geode Silica form Spectroscopy Silanol Ratga Formation
类型	Article
语种	英语
国家	Iraq ; Vietnam
收录类别	SCI-E
WOS记录号	WOS:000468252700007
WOS关键词	OPAL-C ; MICROCRYSTALLINE ; CRISTOBALITE ; SPECTRA ; NOMENCLATURE ; CHALCEDONY ; TRIDYMITE ; MINERALS
WOS类目	Materials Science, Multidisciplinary
WOS研究方向	Materials Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217557
作者单位	1.Univ Baghdad, Coll Sci, Dept Geol, Baghdad, Iraq; 2.Ton Duc Thang Univ, Fac Civil Engn, Sustainable Dev Civil Engn Res Grp, Ho Chi Minh City, Vietnam
推荐引用方式 GB/T 7714	Awadh, Salih Muhammad,Yaseen, Zaher Mundher. Investigation of silica polymorphs stratified in siliceous geode using FTIR and XRD methods[J],2019,228:45-50.
APA	Awadh, Salih Muhammad,&Yaseen, Zaher Mundher.(2019).Investigation of silica polymorphs stratified in siliceous geode using FTIR and XRD methods.MATERIALS CHEMISTRY AND PHYSICS,228,45-50.
MLA	Awadh, Salih Muhammad,et al."Investigation of silica polymorphs stratified in siliceous geode using FTIR and XRD methods".MATERIALS CHEMISTRY AND PHYSICS 228(2019):45-50.