Vibrational spectroscopy of the borate mineral olshanskyite Ca3[B(OH)4]4(OH)2.
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Data
2013
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Resumo
The mineral olshanskyite is one of many calcium
borate minerals which has never been studied using
vibrational spectroscopy. The mineral is unstable and
decomposes upon exposure to an electron beam. This
makes the elemental analysis using EDX techniques difficult.
Both the Raman and infrared spectra show complexity
due to the complexity of the structure. Intense Raman
bands are found at 989, 1,003, 1,025 and 1,069 cm-1 with
a shoulder at 961 cm-1 and are assigned to trigonal borate
units. The Raman bands at 1,141, 1,206 and 1,365 cm-1
are assigned to OH in-plane bending of BOH units. A
series of Raman bands are observed in the 2,900–3,621
cm-1 spectral range and are assigned to the stretching
vibrations of OH and water. This complexity is also
reflected in the infrared spectra. Vibrational spectroscopy
enables aspects of the structure of olshanskyite to be
elucidated.
Descrição
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Raman spectroscopy, Borate, Hydroxy, Olshanskyite
Citação
FROST, R. L. et al. Vibrational spectroscopy of the borate mineral olshanskyite Ca3[B(OH)4]4(OH)2. Carbonates and Evaporites, v. 29, p. 33–39, 2013. Disponível em: <https://link.springer.com/article/10.1007/s13146-013-0162-5>. Acesso em: 20 jun. 2017.