These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: A Raman and infrared spectroscopic study of the sulphate mineral aluminite Al2(SO4)(OH)4·7H2O.
    Author: Frost RL, López A, Scholz R, Wang L.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2015 Sep 05; 148():232-6. PubMed ID: 25897716.
    Abstract:
    The mineral aluminite has been studied using a number of techniques, including scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDX) and Raman and infrared spectroscopy. Raman spectroscopy identifies multiple sulphate symmetric stretching modes in line with the three sulphate crystallographically different sites. Raman spectroscopy also identifies a low intensity band at 1069 cm(-1) which may be attributed to a carbonate symmetric stretching mode, indicating the presence of thaumasite. The observation of multiple bands in this ν4 spectral region offers evidence for the reduction in symmetry of the sulphate anion from Td to C2v or even lower symmetry. The Raman band at 3588 cm(-1) is assigned to the OH unit stretching vibration and the broad feature at around 3439 cm(-1) to water stretching bands. Water stretching vibrations are observed at 3157, 3294, 3378 and 3439 cm(-1). Vibrational spectroscopy enables an assessment of the molecular structure of aluminite to be made.
    [Abstract] [Full Text] [Related] [New Search]