A vibrational spectroscopic study of the phosphate mineral churchite (REE)(PO4)center dot 2H(2)O

作者：Frost Ray L^*; Lopez Andres; Scholz Ricardo; Xi Yunfei; Filho Mauro Candido

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2014, 127: 429-433.

DOI：10.1016/j.saa.2014.02.100

• Churchite-(REE)
• Phosphate
• Rare earths
• Molecular water
• Hydrogen bond lengths
• Raman spectroscopy

Vibrational spectroscopy has been used to study the rare earth mineral churchite of formula (REE)(PO4)center dot 2H(2)O. The mineral contains a range of rare earth metals including yttrium depending on the locality. The Raman spectra of churchite-(REE) are characterized by an intense sharp band at 984 cm(-1) assigned to the v(1) (PO43-) symmetric stretching mode. A lower intensity band observed at around 1067 cm(-1) is attributed to the v(3) (PO43-) antisymmetric stretching mode. The (PO43-) bending modes are observed at 497 cm(-1) (v(2)) and 565 cm(-1)( v(4)). Raman bands at 649 and 681 cm(-1) are assigned to water librational modes. Vibrational spectroscopy enables aspects of the structure of churchite to be ascertained.

• 出版日期2014-6-5