Počet záznamů: 1  

Naturally irradiated fluorite as a historic violet pigment: Raman spectroscopic and X-ray diffraction study

  1. 1.
    SYSNO ASEP0441814
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevNaturally irradiated fluorite as a historic violet pigment: Raman spectroscopic and X-ray diffraction study
    Tvůrce(i) Čermáková, Zdeňka (UACH-T) SAI
    Bezdička, Petr (UACH-T) SAI, RID, ORCID
    Němec, I. (CZ)
    Hradilová, J. (CZ)
    Šrein, V. (CZ)
    Blažek, Jan (UTIA-B) RID, ORCID
    Hradil, David (UACH-T) RID, SAI
    Zdroj.dok.Journal of Raman Spectroscopy. - : Wiley - ISSN 0377-0486
    Roč. 46, č. 2 (2015), s. 236-243
    Poč.str.8 s.
    Jazyk dok.eng - angličtina
    Země vyd.GB - Velká Británie
    Klíč. slovafluorite ; pigment ; fluorescence bands ; diffraction lines broadening ; irradiation
    Vědní obor RIVCA - Anorganická chemie
    CEPGAP103/12/2211 GA ČR - Grantová agentura ČR
    Institucionální podporaUACH-T - RVO:61388980 ; UTIA-B - RVO:67985556
    UT WOS000349891900006
    EID SCOPUS84923016334
    DOI10.1002/jrs.4627
    AnotaceNaturally irradiated violet fluorite, a cubic CaF2mineral, is a rare historic pigment. Its documented usage in Europe stretches from ca. 1450 to ca. 1550. The intensely coloured violetish black naturally irradiated fluorite is commonly called antozonite, which is only vaguely defined based on its dark colour and specific odour emanated during grinding. In the published literature, there have been some discrepancies about its Raman spectrum. Therefore, sixteen samples of antozonite were analysed by Raman (micro-)spectroscopy using five different excitation laser wavelengths (445, 532, 633, 780 and 1064 nm), which revealed specific bands located below500 cm 1 probably related to radiation-caused defects. Their intensity increasedwith increasing violet colour saturation, thus providing a specification for antozonite’s definition. Spectra excited at 445 and 780nmcontained also numerous broad bands above 500 cm 1, which seem to be caused by the presence of rare earth elements. The structural damage of antozonite samples has been assessed by X-ray diffraction and related to their lightness using analysis of image histograms. The obtained results have been applied in the analysis of micro-samples of a Late Gothic altarpiece located in an Italian Court in UNESCO city Kutná Hora, Czech Republic, which contained exceptionally large grains of deep violet fluorite identified as antozonite.
    PracovištěÚstav anorganické chemie
    KontaktJana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
    Rok sběru2016
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.