标题:Temperature dependence of IR absorption of hydrous/hydroxyl species in minerals and synthetic materials
作者:Zhang, Ming; Salje, Ekhard K. H.; Carpenter, Michael A.; Wang, Ji Yang; Groat, Lee A.; Lager, George A.; Wang, Ling; Beran, Anton; Bis 更多
作者机构:[Zhang, M; Salje, EKH; Carpenter, MA; Wang, JY; Groat, LA; Lager, GA; Wang, L; Beran, A; Bismayer, U]Univ Cambridge, Dept Earth Sci, C 更多
通讯作者:Zhang, M
通讯作者地址:[Zhang, M]Univ Cambridge, Dept Earth Sci, Downing St, Cambridge CB2 3EQ, England.
来源:AMERICAN MINERALOGIST
出版年:2007
卷:92
期:8-9
页码:1502-1517
DOI:10.2138/am.2007.2586
关键词:infrared spectroscopy; low temperature; apatite; hydrous garnet;; pyrophyllite; talc; sericite; titanite
摘要:We report on temperature dependencies of infrared (IR) fundamental, combination, and overtone vibrations of hydroxyl species (OH) in nominally anhydrous minerals (e.g., titanite), ferroelectric crystals (KTa1-x, NbxO3, KTN), layer silicates (talc, mica, and pyrophyllite), and hydrous minerals such as apatite and synthetic hydrous/deuterated garnets [Ca3Al2(O4H4)(3) and Ca(3)AI(2)(O4D4)(3)] for the temperature range of 20-300 K. Data obtained by high-resolution FTIR spectroscopy show that increasing temperature generally leads to a decrease in the band height and band area of fundamental vibrations of hydroxyl species, whereas the combination and first-overtone bands commonly show different temperature dependencies. The results show that in the investigated temperature range, the variations ofthe band height and area for different OH bands (especially for combinations and overtones) on cooling or heating do not reflect changes in OH concentrations in the materials, but relate to temperature- dependent absorption coefficients. The observations imply that absorption coefficients calibrated at room temperature cannot necessarily be used for the determinati on of hydroxyl contents at other temperatures.
收录类别:SCOPUS;SCIE
WOS核心被引频次:28
Scopus被引频次:30
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-38849120594&doi=10.2138%2fam.2007.2586&partnerID=40&md5=7381a4aaa434e9b594324e28dc2b8966
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