缅甸还原性次生化翡翠的傅立叶变换红外光谱分析

Fourier Transform Infrared Spectrum analyses on reducing hypergenic jadeite of Burma

傅立叶变换红外光谱分析表明,原生翡翠与还原性次生化翡翠在3800-3000 cm-1范围内,具有不同的红外吸收图谱标型特征,原生翡翠出现右倾斜的“V”字形吸收曲线,峰谷尖锐,吸收率低;还原性次生化翡翠出现“U”字形吸收曲线,峰谷宽阔,吸收率较高。其原因可能与还原性次生化翡翠的微裂隙中穿插充填有绿泥石等含水的粘土类矿物,使其红外光谱在3800-3400 cm-1区段叠加有粘土矿物中水和羟基的吸收峰有关。

Fourier Transform Infrared Spectrum (FTIR) Analysis shows the natural and reducing hypergenic jadeite have different characteristics of infrared spectrum in the range from 3800cm-1 to 3000cm-1 between the natural jadeite has right-inclining Vshape infrared spectra curve, lower absorptivity; but reducing hypergenic jadeite shows Ushape infrared spectra curve, higher absorptivity. The difference maybe due to the clay minerals which filling in the micro-fracture of reducing hypergenic jadeite, Lend to the infrared spectrum of filling clays adding to that of jadeite and change the infrared spectra curve from Vshape to Ushape.