FTIR spectroscopy in the OH-stretching region of monoclinic epidotes from Praborna (St. Marcel, Aosta Valley, Italy)
FTIR spectroscopy in the OH-stretching region of monoclinic epidotes from Praborna (St. Marcel, Aosta Valley, Italy)
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来自 Praborna（意大利奥斯塔山谷圣马塞尔）的单斜绿帘石 OH 拉伸区域的 FTIR 光谱
DOI：
10.1127/ejm/8/4/0655
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发表时间：
1996
影响因子：
2.1
通讯作者：
W. Griffin
中科院分区：
文献类型：
--
作者：
G. Ventura;A. Mottana;G. Parodi;W. Griffin
本文对意大利圣马塞尔普拉博纳单斜绿帘石的晶体化学和红外光谱进行了研究。研究样品的组成从斜黝帘石（Czo）到富sr的片辉石（Pm）不等。在oh -伸展区，(Al, fe3 +)-斜生岩在3345 ~ 3380 cm-1范围内呈单一宽带，属于[M2] Al- o10→H…O4-[M1, 3]（Al, fe3 +）结构。富Sr片煤的光谱在几乎恒定的波数（3417/3454 cm-1）下表现为可分辨的双重态，这可以解释为两种同时发生的效应：(i) Mn 3+进入非oh配位的M3八面体；（ii） Sr取代Ca进入A2。
This paper deals with a crystal-chemical, infrared spectroscopic study of monoclinic epidotes from Praborna (St. Marcel, Val d'Aosta, Italy). The studied samples range in composition from clinozoisite (Czo) to Sr-rich piemontite (Pm). In the OH-stretching region,(Al, Fe 3+)-clinozoisites show a single broad band centred in the range 3345-3380 cm-1 which is assigned to the [M2] Al-O10→ H... O4-[M1, 3](Al, Fe 3+) configuration. The spectra of Sr-rich piemontites show a well-resolvable doublet at almost constant wavenumbers (3417/3454 cm-1) which can be explained by two simultaneous effects:(i) the entry of Mn 3+ in the non-OH-coordinated M3 octahedra and,(ii) the entry of Sr substituting for Ca in A2.