Open AccessZeolitová mineralizace s gmelinitem-K z Jedlky u Benešova nad Ploučnicí (Česká republika)
Author(s) -
Petr Pauliš,
Libor Hrůzek,
Oldřich Janeček,
Zdeněk Dolníček,
Volker Betz,
Luboš Vrtiška,
Radana Malíková,
Ondřej Pour,
Ferry Fediuk
Publication year - 2021
Publication title -
bulletin mineralogie petrologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.239
H-Index - 10
eISSN - 2570-7345
pISSN - 2570-7337
DOI - 10.46861/bmp.29.213
Subject(s) - analcime , chabazite , leucite , nepheline , mineralogy , crystallography , sodalite , zeolite , chemistry , geology , materials science , metallurgy , ceramic , biochemistry , catalysis
A new locality of zeolite minerals occurs on the NE edge of the Jedlka village, at the SE slope of the Hlídka hill, 2 km to W of Benešov nad Ploučnicí (northern Bohemia, Czech Republic). The mineralization is developed in Cenozoic analcime-nepheline tephrite. Ten zeolite mineral species (gmelinite-K, analcime, harmotome, chabazite-Ca, lévyne-Ca, mezolite, natrolite, offretite, phillipsite-K, thomsonite-Ca) were found in small amygdule cavities of tephrite. The most interesting is gmelinite-K, a rare zeolite worldwide, which forms clear, white or slightly yellowish, hexagonal lenticular crystals up to 7 mm, always intergrown with the chabazite-Ca. The unit-cell parameters of gmelinite-K, refined from the powder X-ray data, are a = 13.795 (19), c = 9.811(6) Å and V = 1616.8(3) Å3; its quantitative chemical analyses correspond to the empirical formula (K2.32Ca1.86Sr0.53Na0.20Ba0.19)Σ5.10(Al8.14Si16.01O48)·22H2O.