A vibrational spectroscopic study of the phosphate mineral rimkorolgite (Mg,Mn2+)(5)(Ba, Sr)(PO4)(4)center dot 8H(2)O from Kovdor massif, Kola Peninsula, Russia

作者：Frost Ray L^*; Lopez Andres; Theiss Federick L; Aarao Guilherme Marcos; Scholz Ricardo

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2014, 132: 762-766.

DOI：10.1016/j.saa.2014.04.145

• Rimkorolgite
• Phosphate
• Raman spectroscopy
• Infrared spectroscopy
• Kola Peninsula

We have studied aspect of the molecular structure of the phosphate mineral rimkorolgite from Zheleznyi iron mine, Kovdor massif, Kola Peninsula, Russia, using SEM with EDX and vibrational spectroscopy. Qualitative chemical analysis shows a homogeneous phase, composed by P, Mg, Ba, Mn and Ca. Small amounts of Si were also observed. An intense Raman peak at 975 cm(-1) is assigned to the PO43- v(1) symmetric stretching mode. The Raman band at 964 cm(-1) is attributed to the HPO42- v(1) symmetric stretching vibration. Raman bands observed at 1016, 1035, 1052, 1073, 1105 and 1135 cm(-1) are attributed to the v(3) anti-symmetric stretching vibrations of the HPO42- and PO43- units. Complexity in the spectra of the phosphate bending region is observed. The broad Raman band at 3272 cm(-1) is assigned to the water stretching vibration. Vibrational spectroscopy enables aspects on the molecular structure of rimkorolgite to be undertaken.

• 出版日期2014-11-11