School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.
Spectrochim Acta A Mol Biomol Spectrosc. 2013 Dec;116:160-4. doi: 10.1016/j.saa.2013.06.108. Epub 2013 Jul 6.
We have undertaken a study of the mineral inderite Mg(H4B3O7)(OH) · 5H2O a hydrated hydroxy borate mineral of magnesium using scanning electron microscopy, thermogravimetry and vibrational spectroscopic techniques. The structure consists of [Formula: see text] soroborate groups and Mg(OH)2(H2O)4 octahedra interconnected into discrete molecules by the sharing of two OH groups. Thermogravimetry shows a mass loss of 47.2% at 137.5 °C, proving the mineral is thermally unstable. Raman bands at 954, 1047 and 1116 cm(-1) are assigned to the trigonal symmetric stretching mode. The two bands at 880 and 916 cm(-1) are attributed to the symmetric stretching mode of the tetrahedral boron. Both the Raman and infrared spectra of inderite show complexity. Raman bands are observed at 3052, 3233, 3330, 3392 attributed to water stretching vibrations and 3459 cm(-1) with sharper bands at 3459, 3530 and 3562 cm(-1) assigned to OH stretching vibrations. Vibrational spectroscopy is used to assess the molecular structure of inderite.
我们使用扫描电子显微镜、热重分析和振动光谱技术对含水羟硼镁矿 Mg(H4B3O7)(OH)·5H2O 进行了研究。该结构由[化学式：见正文] soroborate 基团和 Mg(OH)2(H2O)4 八面体组成，通过两个 OH 基团的共享连接成离散的分子。热重分析显示，在 137.5°C 时质量损失 47.2%，证明该矿物热不稳定。拉曼光谱在 954、1047 和 1116 cm(-1)处的带归因于三角对称伸缩模式。在 880 和 916 cm(-1)处的两个带归因于四面体硼的对称伸缩模式。inderite 的拉曼和红外光谱都显示出复杂性。拉曼光谱在 3052、3233、3330、3392 cm(-1)处观察到归因于水伸缩振动的带，在 3459 cm(-1)处观察到更尖锐的带，在 3459、3530 和 3562 cm(-1)处归因于 OH 伸缩振动。振动光谱用于评估 inderite 的分子结构。
