Naslov
Recrystallization of high-temperature samarskite phase from metamict samarskite, Beinmyr, Norway

Autori
Tomašić, Nenad ; Bermanec, Vladimir ; Rajić Linarić Maša

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

Izvornik
Book of Abstracts of the XVI International Conference / Filatov, S. K. - Miass : Russian Academy of Science, Ural Branch, 2007, 211-212

Skup
Crystal Chemistry and Diffraction Studies of Minerals 2007

Mjesto i datum
Miass, Ruska Federacija, 02.07.2007. - 06.07.2007

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
samarskite; metamict; high-temperature modification; Beinmyr; Norway

Sažetak
Due to its very complex composition and natural occurrence in metamict state, samarskite crystal structure has not been resolved yet. Previous studies proposed two structural modifications for samarskite: a) low temperature samarskite, columbite-type structure (s.g. Pbcn), and b) high-temperature samarskite, wolframite-type structure (s.g. P2/c). In the metamict samarskite from Beinmyr, Norway, the relics of the proposed low temperature samarskite structure has been found . The chemical composition of the sample also corresponds well to the assumed ABO4 stoichiometry, yielding chemical formula Y0.27Ca0.24Fe0.21U0.14Ln0.1Nb0.76Ta0.26Ti0.06O4. Therefore, the sample was considered suitable for high-temperature annealing experiments in order to recrystallize the proposed high-temperature samarskite phase.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija

POVEZANOST RADA