A Raman spectroscopic study of the uranyl phosphate mineral threadgoldite.
Raman spectra of threadgoldite at 298 and 77K are measured and interpreted for the first time. Bands related the (UO(2))(2+) and (PO(4))(3-) stretching and bending vibrations are tenatively attributed together with the bands assigned to the stretching a and bending vibrations of water molecules and hydroxyls. Hydrogen-bonding network and H(2)O and (OH)(-1) libration modes are mentioned. U-O bond lengths in uranyls are calculated via empirical relations R(U-O)=f[nu(1) and nu(3)(UO(2))(2+)]A. They are comparable to the values inferred from the single crystal structure analysis of threadgoldite.
Frost
Ray L
RL
Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Qld 4001, Australia. r.frost@qut.edu.au <r.frost@qut.edu.au>
Cejka
Jirí
J
Weier
Matt
M
D006860:Hydrogen Bonding; D008903:Minerals / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D017974:Uranium Compounds / Q000737:chemistry*; D014732:Vibration; D014867:Water / Q000737:chemistry
D008903:Minerals; D010710:Phosphates; D017974:Uranium Compounds; C517345:threadgoldite; D014867:Water; C075963:hydrogen uranyl phosphate