Mineraloške i kristalografske osobine zeolitskog tufa HEU-tipa lokaliteta Novaković, Bosna i Hercegovina
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Abstract
U radu su predstavljeni rezultati mineraloške i strukturne analize zeolitskog tufa lokaliteta Novaković, u Bosni i Hercegovini. Tuf je beličaste boje, osnovni mineralni sastav je mineral iz serije hejlandita – Ca-klinoptilolit. Prateća komponenta je amorfna faza, vulkansko staklo i amorfni SiO2. Ispitivanjem termičke stabilnosti, utvrđeno je da je struktura zeolita stabilna do 600 oC. Određivana je i struktura Ca-klinoptilolita u zeolitskom tufu. Struktura je utačnjavana u prostornoj grupi C2/m, sa neuređenom raspodelom Al i Si u tetraedarskoj mreži. Za ispitivanje su korišćene metode rendgenske difrakcije praha na polikristalnom uzorku (XRD, X-Ray powder diffraction analysis), skenirajuće elektronske mikroskopije i energodisperzivne spektroskopije x-zracima (SEM/EDS, scanning electron microscopy and energy dispersive spectroscopy analysis) i diferencijalno termička i diferencijalno termogravimetrijska analiza (DTA/DTG, differential thermal and thermogravimetric analysis).
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