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@article{1719297,
author = {Zeug, Manuela and Nasdala, Lutz and Ende, Martin and Habler, Gerlinde and Hauzenberger, Christoph and Chanmuang, N. Chutimun and Škoda, Radek and Topa, Dan and Wildner, Manfred and Wirth, Richard},
article_location = {Wien},
article_number = {1},
doi = {http://dx.doi.org/10.1007/s00710-020-00723-x},
keywords = {Parisite-(Ce); Rontgenite-(Ce); Fluorcarbonate; Polycrystal; Raman spectroscopy; Stacking pattern},
language = {eng},
issn = {0930-0708},
journal = {Mineralogy and Petrology},
title = {The parisite-(Ce) enigma: challenges in the identification of fluorcarbonate minerals},
url = {https://doi.org/10.1007/s00710-020-00723-x},
volume = {115},
year = {2021}
}
TY - JOUR
ID - 1719297
AU - Zeug, Manuela - Nasdala, Lutz - Ende, Martin - Habler, Gerlinde - Hauzenberger, Christoph - Chanmuang, N. Chutimun - Škoda, Radek - Topa, Dan - Wildner, Manfred - Wirth, Richard
PY - 2021
TI - The parisite-(Ce) enigma: challenges in the identification of fluorcarbonate minerals
JF - Mineralogy and Petrology
VL - 115
IS - 1
SP - 1-19
EP - 1-19
PB - Springer Wien
SN - 09300708
KW - Parisite-(Ce)
KW - Rontgenite-(Ce)
KW - Fluorcarbonate
KW - Polycrystal
KW - Raman spectroscopy
KW - Stacking pattern
UR - https://doi.org/10.1007/s00710-020-00723-x
L2 - https://doi.org/10.1007/s00710-020-00723-x
N2 - A multi-methodological study was conducted in order to provide further insight into the structural and compositional complexity of rare earth element (REE) fluorcarbonates, with particular attention to their correct assignment to a mineral species. Polycrystals from La Pita Mine, Municipality de Maripi, Boyaca Department, Colombia, show syntaxic intergrowth of parisite-(Ce) with rontgenite-(Ce) and a phase which is assigned toB(3)S(4)(i.e., bastnasite-3-synchisite-4; still unnamed) fluorcarbonate. Transmission electron microscope (TEM) images reveal well-ordered stacking patterns of two monoclinic polytypes of parisite-(Ce) as well as heavily disordered layer sequences with varying lattice fringe spacings. The crystal structure refinement from single crystal X-ray diffraction data - impeded by twinning, complex stacking patterns, sequential and compositional faults - indicates that the dominant parisite-(Ce) polytypeM(1)has space groupCc. Parisite-(Ce), theB(3)S(4)phase and rontgenite-(Ce) show different BSE intensities from high to low. Raman spectroscopic analyses of parisite-(Ce), theB(3)S(4)phase and rontgenite-(Ce) reveal different intensity ratios of the three symmetric CO(3)stretching bands at around 1100 cm(-1). We propose to non-destructively differentiate parisite-(Ce) and rontgenite-(Ce) by their 1092 cm(-1)/ 1081 cm(-1)nu(1)(CO3) band height ratio.
ER -
ZEUG, Manuela, Lutz NASDALA, Martin ENDE, Gerlinde HABLER, Christoph HAUZENBERGER, N. Chutimun CHANMUANG, Radek ŠKODA, Dan TOPA, Manfred WILDNER a Richard WIRTH. The parisite-(Ce) enigma: challenges in the identification of fluorcarbonate minerals. \textit{Mineralogy and Petrology}. Wien: Springer Wien, 2021, roč.~115, č.~1, s.~1-19. ISSN~0930-0708. Dostupné z: https://dx.doi.org/10.1007/s00710-020-00723-x.
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