【摘要】 运用傅里叶变换红外光谱仪对不同亚类硅酸盐宝玉石矿物进行近红外光谱测试.分析发现:硅酸盐类宝玉石矿物广泛存在水的合频、倍频吸收峰,其存在形式又可以分为H₂O和OH^-.岛状硅酸盐宝石矿物存在广泛的类质同象替代现象,主要表现为羟基OH^-以及阳离子跃迁和阳离子替代引起的吸收峰,如:石榴石中7 800 cm^-1±和5 880 cm^-1±位置阳离子跃迁和阳离子替代引起的吸收峰,橄榄石中7 065 cm^-1、4 986 cm^-1处OH^-的吸收峰;环状硅酸盐和层状硅酸盐宝石矿物中的分子空隙通常较大,其中存在大量的金属阳离子（M）、OH^-、H₂O等,主要表现为4 200～4 800cm^-1处大量的M-OH振动吸收峰.除岛状硅酸盐宝石矿物外,环状、链状、层状及架状硅酸盐宝石矿物均存在Si=O=Si（桥氧）4 880cm^-1±的伸缩振动三级倍频吸收峰.更多还原

【Abstract】 Fourier transform infrared spectrometer was used to test the near-infrared spectroscopy of different kinds of silicate gemstone minerals. The analysis shows that the silicate gemstone minerals have a wide range of water frequency and frequency doubling absorption peaks and the existence form of water can be divided into H₂O and OH^-. The island silicate gem minerals are mainly represented by OH^- and the morphological transitions and cation substitutions due to the Extensive existence of Isomorphic substitution, Such as: absorption peaks caused by cation transition and cation substitution at 7 800 cm^-1±and 5 880 cm^-1±positions in garnet and absorption peak of OH^- at 7 065 cm^-1 and 4 986 cm^-1 in olivine; The molecular voids in the cyclic silicate and the layered silicate gem mineral are usually large and there are a large number of metal cations（M）, OH^-, H₂O, etc. There are lots of M-OH vibration absorption peaks at 4 200～4 800 cm^-1. Expect for the island silicate gemstone minerals, cyclic, chain, layered and framework silicate gemstone minerals have a three-stage frequency doubling absorption peak of stretching vibration of Si=O=Si（The bridge oxygen） at 4 880 cm^-1±.更多还原