Results 1 to 10 of about 145 (96)

The parisite-(Ce) enigma: challenges in the identification of fluorcarbonate minerals. [PDF]

Mineral Petrol, 2021
AbstractA 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.
Zeug M, Nasdala L, Ende M, Habler G, Hauzenberger C, Chanmuang N C, Škoda R, Topa D, Wildner M, Wirth R.   +9 more
europepmc   +10 more sources

KUKHARENKOITE-(Ce) AND ITS MINERAL ASSEMBLAGE IN PEGMATITES OF THE VISHNEVYE MOUNTAINS (SOUTH URALS) [PDF]

Минералогия, 2021
A rare Ba and REE fluorocarbonate kukharenkoite-(Ce) Ba2 Ce(CO3 )3 F with empirical formula (Ba1.88Sr0.17)2.05(Ce0.53La0.31Nd0.11)0.95(CO3 )3 F was found in alkali pegmatite of vein no. 35 in the Vishnevye Mountains, South Urals. Kukharenkoite-(Ce) forms
V.I. Popova, M.A. Rassomakhin, V.A. Popov, A.M. Kuznetsov, S.M. Lebedeva   +4 more
doaj   +2 more sources

Bastnäsite-(Ce) and Parisite-(Ce) From Mt. Malosa, Malawi

Gems & Gemology, 2010
Alessandro Guastoni, Fabrizio Nestola
exaly   +3 more sources

The parisite-(Ce) mineralization associated with the Fazenda Varela carbonatite (Correia Pinto, SC)

Pesquisas em Geociências, 2013
O carbonatito Fazenda Varela faz parte do complexo alcalino de Lages (SC), que pertence ao final do Cretáceo. O carbonatito ocorre na forma de abundantes veios que cortam arenitos da Formação Rio Bonito que foram fortemente brechados e metassomatizados.
Manfredi, Tamara Reginatto, Bastos Neto, Artur C., Pereira, Vitor P., Barbanson, Luc, Schuck, Cristine   +4 more
core   +7 more sources

Multivariate Statistical Analysis on a SEM/EDS Phase Map of Rare Earth Minerals. [PDF]

Scanning, 2020
The scanning electron microscope/X‐ray energy dispersive spectrometer (SEM/EDS) system is widely applied to rare earth minerals (REMs) to qualitatively describe their mineralogy and quantitatively determine their composition. The performance of multivariate statistical analysis on the EDS raw dataset can enhance the efficiency and the accuracy of phase
Teng C, Gauvin R.
europepmc   +2 more sources

RöENTGENITE-(CE) AND OTHER REE FLUORCARBONATES FROM VEIN no. 35, VISHNEVYE MOUNTAINS, SOUTHERN URALS [PDF]

Минералогия, 2019
A mineral assemblage including REE fluorcarbonates (röntgenite-(Ce) Ca2Ce3(CO3)5F3 , parisite-(Ce) CaCe2(CO3 )3F2 , synchisite-(Ce) CaCe(CO3 )2F and bastnäsite-(Ce) Ce(CO3 )F) was discovered at the dumps of the Vein № 35 open pit, Mt.
A.V. Kasatkin, R. Škoda, F. Nestola, A.M. Kuznetsov, E.V. Belogub, A.A. Agakhanov   +5 more
doaj   +2 more sources

Vielleaureite-(Ce), a new epidote of the dollaseite group, coexisting with Mn-dominant hellandite in Mn deposits of the central Pyrenees [PDF]

European Journal of Mineralogy
The new rare-earth element (REE) bearing epidote-supergroup mineral vielleaureite-(Ce), Mn2+Ce(MgAlMn2+)(Si2O7)(SiO4)F(OH), is described from a Paleozoic stratiform Mn ore deposit at the Coustou mine above the village of Vielle-Aure, Hautes Pyrénées ...
A. Ragu, L. Bindi, P. Bonazzi, L. Remusat, C. Chopin   +4 more
doaj   +2 more sources

NEW FINDINGS OF RARE MINERALS IN PEGMATITES OF VISHNEVYE MOUNTAINS IN THE SOUTHERN URALS [PDF]

Минералогия, 2019
In addition to previously known 221 minerals, 11 new rare minerals were identified in alkali pegmatites of the Vishnevye Mountains. Yttrialite-(Y)Y2(Si2O7) and huanghoite-(Ce) aCe(CO3 2F were found for the first time in the Urals.
V.I. Popova, V.A. Popov, I.A. Blinov, V.A. Kotlyarov, A.V. Kasatkin, R. Škoda, S.M. Lebedeva   +6 more
doaj   +1 more source

HRTEM investigation of bastnäsite–parisite intergrowths from Mount Malosa (Malawi): ordered sequences, polysomatic faults, polytypic disorder, and a new parisite-(Ce) polymorph

European Journal of Mineralogy, 2019
This high-resolution transmission electron microscopy (HRTEM) investigation of (Ca, REE)-fluorcarbonates from Mount Malosa (Malawi), previously characterized by bulk techniques, is aimed at elucidating the pervasive syntactic intergrowths that commonly affect these minerals.
exaly   +3 more sources

Evaluating the Compatibility of Hematite (U‐Th)/He Data and Hematite‐Carried Secondary Magnetizations: An Example From the Colorado Front Range

Geochemistry, Geophysics, Geosystems, Volume 24, Issue 9, September 2023., 2023
Abstract Ancient magnetization(s), often recorded by hematite (Fe2O3), provide key paleomagnetic constraints on plate interactions through time. Primary remanent magnetizations may be modified or overprinted by secondary processes that complicate interpretations of paleomagnetic data. Hematite (U‐Th)/He (hematite He) dating has the potential to resolve
Jordan L. Jensen, Alexis K. Ault, John W. Geissman   +2 more
wiley   +1 more source