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DOI10.1016/j.matchemphys.2019.02.048
Investigation of silica polymorphs stratified in siliceous geode using FTIR and XRD methods
Awadh, Salih Muhammad1; Yaseen, Zaher Mundher2
通讯作者Yaseen, Zaher Mundher
来源期刊MATERIALS CHEMISTRY AND PHYSICS
ISSN0254-0584
EISSN1879-3312
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
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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.
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