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New data on “kerolite–pimelite” series and the colouring agent of Szklary chrysoprase, Poland
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SYSNO ASEP 0463700 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název New data on “kerolite–pimelite” series and the colouring agent of Szklary chrysoprase, Poland Tvůrce(i) Čermáková, Zdeňka (UACH-T) SAI
Hradil, David (UACH-T) RID, SAI
Bezdička, Petr (UACH-T) SAI, RID, ORCID
Hradilová, J. (CZ)Zdroj.dok. Physics and Chemistry of Minerals. - : Springer - ISSN 0342-1791
Roč. 44, č. 3 (2017), s. 193-202Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova Pimelite ; Colourant ; Interlayer water ; Chrysoprase ; X-ray diffraction ; Thermal analysis Vědní obor RIV DB - Geologie a mineralogie Obor OECD Mineralogy CEP GA14-22984S GA ČR - Grantová agentura ČR Institucionální podpora UACH-T - RVO:61388980 UT WOS 000396046400004 EID SCOPUS 84990855379 DOI 10.1007/s00269-016-0848-z Anotace Green clay and chrysoprase samples from the Ni-laterite deposit in Szklary, Poland, were studied by X-ray diffraction (XRD), electron microprobe analysis (EMPA), Raman, infrared and UV–VIS–NIR absorption spectroscopies. The clay samples proved to be Ni-rich “kerolite” and “pimelite”, and as these minerals are currently discredited, their nature was studied in more detail by high-temperature X-ray diffraction and thermal analysis coupled with mass spectrometry. These methods showed that “kerolite” and “pimelite” contain interlayer water, i.e. they differ from the non-hydrated talc–willemseite mineral series. Subsequently, the XRD and EMPA analyses of Szklary chrysoprase indicated that chrysoprase’s colouring agent is “pimelite”, which was further corroborated by Raman and UV–VIS–NIR spectroscopies. In addition, the Szklary chrysoprase, which has been quarried since the Middle Ages and used in jewellery and wall decorations (e.g. in the Prague Cathedral), was described from the gemmological point of view. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2017
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