Naslov
Crystal-chemical properties of complex metamict minerals - allanite

Autori
Čobić, Andrea ; Klementová, Mariana ; Drábek, Milan ; Tomašić, Nenad ; Bermanec, Vladimir

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

Skup
1st European Crystallography School

Mjesto i datum
Pavia, Italija, 28.08.2014. - 06.09.2014

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
HRTEM; allanite; recrystallization mechanism

Sažetak
Metamict minerals are minerals with damaged or destroyed crystal structure. They have been known since the beginning of the 19th century as a third class of amorphous substances. There are two causes for metamictization of minerals: radioactive decay of Th and U comprised in their crystal structure complexity of their crystal-chemical properties.Allanite has a general formula: CaREEAlAlFe2+[SiO4|Si2O7]O(OH) where REE = Ce, La, Nd, Y, and Th and U. Allanite readily appears metamict due to its rather complex crystal structure and chemical composition, along with the radioactive decay of most notably Th, but also U. Main purpose of investigating metamict minerals lies in the fact that they are natural analogues of radioactive waste disposal materials. Also, minerals containing radioactive elements Th and U are used for geochronology

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA