电气石中水的振动谱学研究及其意义

利用偏振喇曼光谱（ＰＲＳ）和傅里叶变换红外光谱（ＦＴＩＲ）研究了三种不同成因电气石单晶的振动谱学特征。ＰＲＳ研究表明电气石结构中三个阴离子团（即［Ｓｉ６Ｏ１８］＾１２－、［ＢＯ３］＾３－、［ＯＨ］＾－）的喇曼谱在平行ｃ轴方向（／／ＮＥ）比垂直ｃ轴方向（／／ＮＯ）敏锐，而且［ＯＨ］＾－喇曼光谱只在平行ｃ轴的ＰＲＳ中才观察到。不同成因电气石中［ＯＨ］＾－占位不同。结合ＦＴＩＲ研究发现在伟晶型和热液型的

A STUDY ON THE VIBRATIONAL SPECTRA OF WATER IN TOURMALINE

On the basis of the palorized Raman spectra (PRS) and Fourier transform infrared spectra(FTIR) date, we describe the vibrational spectroscopic characteristics of single tourmaline crystalsof different geneses. All PRS of tourmaline's anion groups which consist of (Si6O18)12-, (BO3)3-and (OH)- indicate that the Raman spectra in the N. direction (parallel to the c-axis) are moresensitive than those in the No direction (perpendicular to the c-axis), and the Raman spectra of(OH) group can only be observed from the NE direction. The occupancy of (OH)- varies with the genesis of tourmaline. In combination with FTIR data, it is found that there exists crystallized wa-ter in the tunnel of tourmaline which belongs to the pegmatitic or hydrothermal type. The discov-ery is helpful to research on crystal chemistry and genesis of tourmaline, but also provides new ideas for the varition of material properties (such as color, transparency, piezoelectricity, pyro-electricity, etc. ) of tourmaline which contains hydrogen species.