TY - JOUR
T1 - Recrystallization mechanisms of fergusonite from metamict mineral precursors
AU - Tomasic, N
AU - Gajovic, A
AU - Bermanec, V
AU - Su, D S
AU - Rajic, Linaric M
AU - Ntaflos, Theodoros
AU - Schlögl, Robert
N1 - DOI: 10.1007/s00269-006-0061-6
Affiliations: Faculty of Science, Institute of Mineralogy and Petrography, University of Zagreb, Horvatovac bb, 1000 Zagreb, Croatia; Rudjer Bos?kovicŽ Institute, POB 180, 1002 Zagreb, Croatia; Fritz Haber Institut der Max-Planck-Geselschaft, 14159 Berlin, Germany; Brodarski Institut, 1000 Zagreb, Croatia; Department of Geological Sciences, University of Vienna, Althastr. 14, 1090 Vienna, Austria
Adressen: Tomas?icŽ, N.; Faculty of Science; Institute of Mineralogy and Petrography; University of Zagreb; Horvatovac bb Zagreb 10000, Croatia; email: [email protected]
Source-File: EarthScienceScopus_iso.csv
Import aus Scopus: 2-s2.0-33645470471
Importdatum: 27.11.2006 19:23:17
30.10.2007: Datenanforderung 1951 (Import Sachbearbeiter)
PY - 2006
Y1 - 2006
N2 - The metamict state and recrystallization of fergusonite in metamict natural samples were studied by thermal methods (TGA-DTA), X-ray powder diffraction (XRD), Raman spectroscopy (RS), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and electron microprobe (EPMA). Two metamict mineral samples of fergusonite were investigated in order to identify the original premetamict crystal structure and to identify recrystallization mechanisms. The TEM data and RS provided evidence on the partial preservation of the original structure in the investigated minerals, which are X-ray amorphous. It was shown that fergusonite could recrystallize from a metamict mineral with original fergusonite structure or from metamictized pyrochlore, which was altered before or after metamictization. Two recrystallization mechanisms were recognized: (a) epitaxial growth occurring at the boundary between preserved premetamict structure fragments and completely metamictized areas, and (b) nucleation-crystal growth mechanism occurring in completely amorphous areas of the minerals, and resulting in recrystallization of the original mineral as well as in the crystallization of a new mineral with a modified chemical composition as compared to the initial matrix. ΠSpringer-Verlag 2006.
AB - The metamict state and recrystallization of fergusonite in metamict natural samples were studied by thermal methods (TGA-DTA), X-ray powder diffraction (XRD), Raman spectroscopy (RS), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and electron microprobe (EPMA). Two metamict mineral samples of fergusonite were investigated in order to identify the original premetamict crystal structure and to identify recrystallization mechanisms. The TEM data and RS provided evidence on the partial preservation of the original structure in the investigated minerals, which are X-ray amorphous. It was shown that fergusonite could recrystallize from a metamict mineral with original fergusonite structure or from metamictized pyrochlore, which was altered before or after metamictization. Two recrystallization mechanisms were recognized: (a) epitaxial growth occurring at the boundary between preserved premetamict structure fragments and completely metamictized areas, and (b) nucleation-crystal growth mechanism occurring in completely amorphous areas of the minerals, and resulting in recrystallization of the original mineral as well as in the crystallization of a new mineral with a modified chemical composition as compared to the initial matrix. ΠSpringer-Verlag 2006.
M3 - Article
SN - 0342-1791
VL - 33
SP - 145
EP - 159
JO - Physics and Chemistry of Minerals
JF - Physics and Chemistry of Minerals
IS - 2
ER -