Vibrational spectroscopic study of the copper silicate mineral kinoite Ca2Cu2Si3O10(OH)(4)

作者：Frost Ray L^*; Xi Yunfei

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2012, 89: 88-92.

DOI：10.1016/j.saa.2011.12.051

• Kinoite
• Papagoite
• Whelanite
• Stringhamite
• Cupric ions
• Healing mineral
• Vibrational spectroscopy

Kinoite Ca2Cu2Si3O10(OH)(4) is a mineral named after a Jesuit missionary. Raman and infrared spectroscopy have been used to characterise the structure of the mineral. The Raman spectrum is characterised by an intense sharp band at 847 cm(-1) assigned to the nu(1) (A(1g)) symmetric stretching vibration. Intense sharp bands at 951, 994 and 1000 cm(-1) are assigned to the nu 3 (E-u, A(2u), B-1g) SiO4 antisymmetric stretching vibrations. Multiple nu(2) SiO4 vibrational modes indicate strong distortion of the SiO4 tetrahedra. Multiple CaO and CuO stretching bands are observed. Raman spectroscopy confirmed by infrared spectroscopy clearly shows that hydroxyl units are involved in the kinoite structure. Based upon the infrared spectra, it is proposed that water is also involved in the kinoite structure. Based upon vibrational spectroscopy, the formula of kinoite is defined as Ca2Cu2Si3O10(OH)(4)center dot xH(2)O.

• 出版日期2012-4