Raman and infrared spectra of pollucite

Technical Report · Mon May 01 04:00:00 EDT 1978

DOI:https://doi.org/10.2172/6693453· OSTI ID:6693453

Hartwig, C M; Ottesen, D K

Raman light scattering, infrared reflection, and infrared absorption spectra are reported for the mineral pollucite and other cesium aluminosilicate formulations of interest to the beneficial use program of Sandia Laboratories. In addition, Raman spectra of crystals of a pure-phase pollucite are presented. Assignment of the active normal modes is made; a resonance at 200 cm/sup -1/ is tentatively assigned to a Cs cage mode; the remaining resonances are assigned to oxygen stretching vibrations of the Al-0 and Si-0 bonds, external vibrations of the aluminosilicate framework, and to more complex vibrations involving all of the atoms of the crystal. It is shown that by using a reference crystalline spectrum, oher cesium aluminosilicate structures can be identified as polycrystalline in nature with a makeup similar to pollucite. Structural alterations (broken bonds) as well as state changes (crystalline to amorphous) can also be ascertained by Raman spectroscopy. Water is found only in mineral pollucite, where it exists as a monomer, hydrogen-bonded to oxygen atoms that form its cage. Satisfactory results were obtained from a range of materials; black to milky to clear in appearance.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 6693453
• Report Number(s): SAND-78-8232
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
CESIUM COMPOUNDS
CHEMICAL BONDS
CRYSTAL STRUCTURE
INFRARED SPECTRA
OXYGEN COMPOUNDS
RAMAN SPECTRA
SILICATES
SILICON COMPOUNDS
SPECTRA