本實驗主要目的是在常溫常壓下對各種不同固溶系列之角閃石類礦物進行拉曼光譜之量測並探討頻譜的變化。以X光繞射法（XRD）分析求得結構參數，以及電子微探分析（EPMA）確定化學成分；對角閃石礦物群拉曼光譜之振動模進行初步比對，並進一步找出角閃石拉曼光譜與化學成分之關聯性，繼而建立角閃石之拉曼光譜資料庫。

本研究共收集29種角閃石礦物。在進行拉曼光譜分析前已由XRD及EPMA資料確定其礦物化學及結構。對照Leake等人（1997）之分類，可分成六個部分來探討。1.褐閃石系列 2.透閃石系列 3.普通角閃石系列 4.氧角閃石系列 5.鎂紅閃石 6.鈉質角閃石系列（包括:藍閃石及鎂鋁鈉閃石）。

角閃石類礦物之拉曼光譜，在單一結構下(單斜晶系C2/m)，隨著不
同的化學成分，光譜特徵即有所差異。以Si-Ob-Si之振動模最為明顯，
範圍為665~675cm-1，再配合高頻OH（3600cm-1）振動模之個數即可
區分出不同固溶系列之角閃石。在半定量的研究上，以透閃石系列較可
行，不過也只能估計鎂鐵含量的變化。因為此系列可觀察到高頻OH振
動模，隨鐵含量的增加（Mg/(Mg+Fe+2)之比例分別在95.8以上、92.3~95.8
之間及92.3以下），從一個轉變成三個振動模。另外，藍閃石系列中，
對照Wang（1988）之理論計算，本研究更測出了離子於（M1 M1 M3）
佔位之(Fe2+ Fe2+ Fe2+)及(Fe2+ Fe2+ Al3+)的兩種組態。

Raman spectroscopic method was applied to study the Raman shifts of a number of solid solution series in amphiboles. Each sample was examined by EPMA and XRD techniques for the identification of its structure and chemical composition.

There are 29 amphibole samples in this study. The structure of these amphiboles belongs to space group C2/m. The amphiboles investigated in this work include two solid solution series: cummingtonite-grunerite and tremolite-actinolite, and four individual species: hornblende, oxyhornblende, magnesio-katophorite and glaucophane.

The most distinct Raman peak detected in the amphiboles is around 665~675 cm-1, which is associated with the Si-O-Si bending mode. In addition to the Si-O-Si bending mode, the low frequency Raman peaks vary in frequency, with respect to a variation in their chemical composition. The identity of each amphibole species can be qualitatively identified on the basis of their characteristic Raman modes in both low-wavenumber region and high-wavenumber region around 3600 cm-1, where the OH stretching modes occur.

Using Raman spectroscopic method for semi-quantitative analysis is feasible in solid solution series of the C2/m amphiboles. However, this application is limited to major elements composition such as Fe and Mg. In the tremolite-actinolite series, we observed the splitting of OH stretching mode with an increase in Fe-content. When Mg#=(Mg/Mg+Fe2+) is above 95.8, there is only one OH mode. Two OH modes show up when Mg# is between 92.3 and 95.8. When Mg# is lower than 92.3, three OH peak are observed. In glaucophane, we detected all the possible OH modes for every configuration of cation site occupancy predicted by Wang et al (1988) based on theoretical calculation.

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