Naslov
Sanidine twins from Zvegor, Republic of Macedonia

Autori
Zebec, Vladimir ; Žigovečki Gobac, Željka ; Mikulčić Pavlaković, Snježana ; Šijakova-Ivanova, Tena ; Čobić, Andrea ; Bermanec, Vladimir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Acta mineralogica-petrographica, Abstract series, Volume 7 / Fehér, Béla - Segedin : University of Szeged, 2012, 163-163

Skup
Joint 5th Mineral Sciences in the Carpathians Conference (MSCC) and the 3rd Central-European Mineralogical Conference (CEMC)

Mjesto i datum
Miskolc, Mađarska, 19.04.2012. - 21.04.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
sanidine twins; Zvegor; Republic of Macedonia

Sažetak
Sanidine crystals were collected from quartz latite rocks east of the village Zvegor, in eastern part of the Republic of Macedonia. Morphology of these crystals was already described, but so far, among these crystals, only Carlsbad twins were observed. X-ray powder diffraction analysis of these crystals confirmed a sanidine crystal structure. Representative crystals were chosen for a goniometric measurement, which was done by two-circle reflecting goniometer. According to observation and measurements done, together with Carlsbad twins already observed, two new types of twins have been discovered. First, there are twins according to Manebach twin law, where twin plane is (001) and second, (110)-l Prism law, where twin plane is (110). Among all twins present, Carlsbad twins are most abundant. Left- and right-handed Carlsbad twins are almost equally present. In several cases a left- and a right-handed twinning in a just one twining formation is present. A complex multiple twinning is observed, where Carlsbad twins are between themselves grown according to (110) Prism twin law. Manebach twins are elongated along [100]. Although all these types of twins are already mentioned in literature, twins according to (110) Prism law are not so common, and, therefore, their finding is notable.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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