The molecular structure of the phosphate mineral väyrynenite : a vibrational spectroscopic study (CROSBI ID 195458)
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Podaci o odgovornosti
Frost, Ray, L. ; López, Andrés ; Xi, Yunfei ; Žigovečki Gobac, Željka ; Scholz, Ricardo
engleski
The molecular structure of the phosphate mineral väyrynenite : a vibrational spectroscopic study
We have studied the mineral väyrynenite from the Viitaniemi pegmatite, located in the Eräjärvi area, Finland using a combination of electron microscopy electron microprobe and vibrational spectroscopic techniques. Chemical analysis shows the formula of the mineral to be (Mn0.88, Fe0.08, Mg0.01)Σ0.97Be1.02(PO4)1.00(OH)1.02. Vibrational spectroscopy enables an assessment of the molecular structure of väyrynenite to be assessed. An intense Raman band at 1004 cm-1 is to the PO4 3- ν1 symmetric stretching mode. The observation of multiple bands in the phosphate stretching region, offers support for the concept of different phosphate units in the väyrynenite structure. Infrared spectroscopy confirms this multiplicity of vibrational bands. Multiple bands are observed in the phosphate bending region.
infrared spectroscopy; pegmatite; phosphate; Raman spectroscopy; väyrynenite
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