A vibrational spectroscopic study of the borate mineral takedaite Ca-3(BO3)(2)

作者：Frost Ray L^*; Lopez Andres; Xi Yunfei; Graca Leonardo M; Scholz Ricardo

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2014, 132: 833-837.

DOI：10.1016/j.saa.2014.06.004

• Takedaite
• Borate
• Calcium
• Raman spectroscopy
• Infrared spectroscopy

We have studied the mineral takedaite Ca-3(BO3)(2), a borate mineral of calcium using SEM with EDX and vibrational spectroscopy. Chemical analysis shows a homogeneous phase, composed of Ca. Boron was not detected. A very intense Raman band at 1087 cm(-1) is assigned to the BO stretching vibration of BO3 units. Additional Raman bands may be due to isotopic splitting. In the infrared spectrum, bands at 1218 cm(-1) and at 1163, 1262 and 1295 cm(-1) are assigned to the trigonal borate stretching modes. Raman bands at 712 and 715 cm(-1) are assigned to the in-plane bending modes of the BO3 units. Vibrational spectroscopy enables aspects of the molecular structure of takedaite to be assessed.

• 出版日期2014-11-11