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.
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>
Ray L
RL
Frost
Jirí
J
Cejka
Matt
M
Weier
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