利用高温拉曼光谱技术,对异极矿进行了原位拉曼光谱的测试和研究。结果表明,异极矿加热至800K时,与结晶水(H2O)中O—H伸缩振动对应的3470cm^-1特征拉曼谱峰消失,但标志硅酸盐骨架[Si2O7](Q1)结构的特征谱峰926cm^-1未受影响,表明结晶水的丢失并不影响异极矿的整体结构。当加热至1050K,反映结构水O-H伸缩振动的特征峰3580cm^-1消失,与Q1结构单元Si-Onb对称伸缩振动相对应的特征峰926cm^-1强度逐渐减小,并出现与Q0相对应的852.4cm^-1特征峰。这表明加热到1050K时,异极矿开始出现相变。当升温达1100K以上,结构水(OH)的特征谱峰(3580cm^-1)消失,与Si-Orb对称伸缩振动对应的特征拉曼谱峰变为855cm^-1,这标志着异极矿原有的Q1结构已完全转变为硅锌矿的仉结构([SiO4]结构),也就是说异极矿已完成向硅锌矿的转变。
An in-situ Raman spectra test and study on the hemimorphite were carried out by high temperature Raman spectra technique. The test results show that the characteristic Raman peak of 3,470 cm^-1 representing O - H stretching vibration in the molecular H2O is disappeared as the hemimorphite being heated 800 K, but the characteristic peak 926 cm ^- 1 marked Q1 of the main framework [ Si2O7 ] is been retained, which means the structure of the hemimorphite is not changed as the H2O lost. The characteristic peak of 3,580 cm^-1 related to stretching vibration of the O - H in the structure water (OH) is disappeared as the sample being heated 1,050 K. The relative intensity of the characteristic peak 926 cm^-1 related to symmetric stretching vibration of nonbridging oxygen of structure unit Q1 gradually decreases, comparing with the growing Raman band of Q0 characteristic peak at 852.4 cm^-1, which indicates the phase transformation of the hemimorphite is started out at 1, 050 K. The structure water (OH) is dehydrated completely as the temperature is over 1, 100 K, the character- istic peak (3,580 cm^-1) of the structure water (OH) disappears completely, the characteristic peak related to Si -Onb stretching vibration becomes 855 cm^-1, which shows that primary Qlof the hemimorphite is returned to Qo (i. e. [ SiO4] ), and which means that the hemimorphite is completely transformed to willemite.