Podrobnosti záznamu

    Discrimination of zeolites and beryllium containing silicates using portable Raman spectroscometric equipment with near-infrared excitation
    Edwards, H. G. M.
    Jehlička, Jan
    Vandenabeele, P.
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
    Roč. 86, č. FEBRUARY
Výraz tezauru
    Be-containing silicates
    portable instrumentation
    Raman spectroscopy
Klíčové slovo
Abstrakt (anglicky)
   In this paper Raman spectra were obtained for a series of zeolites (thomsonite, stilbite, natrolite) and beryllium containing silicates (beryl, chrysoberyl, euclase, phenacite, bavenite, milarite) using a portable Raman specrometer with a 785 nm laser excitation to show the possibility to apply this setting for unambiguous detection and discrimination of these silicate minerals. Obtained spectra contain the most intense Raman bands at the same positions 12-4 cm(-1) as reported in the literature. The use of these bands permits the unambiguous identification of these phases. Data show the possibility to discriminate individual species of similar whitish color and aspect. Measurements showed an excellent correspondence of Raman bands obtained using the portable system and a laboratory Raman microspectrometer (with the same excitation laser wavelenght). However, for several minerals of these groups (chrysoberyl, bertrandite, chiavennite) Raman spectra were not of sufficient quality to perm
   it unambiguous identification. The reasons are discussed. Raman spectrum of chiavennite CaMnBe2Si5O13(OH)(2)center dot 2(H2O) - a transformation product occurring together with bavenite on the surface of beryl crystals was obtained for the first time using the laboratory Raman spectrometer.
    UK Praha, Přírodovědecká fakulta
Kód přispěvatele
    UK, PřF
Zdrojový formát
Datum importu
    27. 4. 2014