Naslov
Raman spectra and luminescence of the minerals with aeschynite and euxenite crystal structure

Autori
Tomašić, Nenad ; Gajović, Andreja ; Bermanec, Vladimir

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

Izvornik
EUCMOS 2008 XXXIX European Congress on Molecular Spectroscopy, Book of Abstracts / Musić, Svetozar ; Ristić, Mira ; Krehula, Stjepko - Zagreb : Institut Ruđer Bošković, 2008, 267-267

Skup
EUCMOS 2008 XXXIX European Congress on Molecular Spectroscopy

Mjesto i datum
Opatija, Hrvatska, 31.08.2008. - 05.09.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
aeschynite; euxenite; Raman spectra; luminescence

Sažetak
Metamict minerals aeschynite-(Y) and polycrase-(Y) showed aeschynite and euxenite structure after recrystallization, respectively. Raman spectra of these minerals show luminescence lines strongly interfering with normal vibration modes (Fig. 1), especially in 200-500 cm-1 range (region of Ti/Nb/Ta-O stretching and bending modes). However, their synthetic analogs of REETiTaO6 composition having single REE content and aeschynite or euxenite structure do not show luminescence lines using 488 and 514.5 nm Ar excitation lines up to 900 cm-1 with exception of the Er member [1]. In the case of polycrase-(Y) a separated strong luminescence line is also observed at 684 cm-1. The origin of luminescence in these minerals is discussed in term of the complex REE composition, the crystal field formed in the structure during recrystallization process and its influence on REE in cation sites.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija

POVEZANOST RADA