Results 191 to 200 of about 7,496 (223)

Lueshite, pyrochlore and monazite-(Ce) from apatite-dolomite carbonatite, Lesnaya Varaka complex, Kola Peninsula, Russia

Mineralogical Magazine, 1998
AbstractApatite-dolomite carbonatite at Lesnaya Varaka, Kola Peninsula, Russia, hosts intricate mineral intergrowths composed of lueshite in the core and pyrochlore-group minerals in the rim. Lueshite is a primary Nb-bearing phase in the carbonatite and ranges in composition from cerian lueshite to almost pure NaNbO3.
A. R. Chakhmouradian, R. H. Mitchell
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Zoning and sectoriality of monazite-(Ce) from granite pegmatites of the central and South Urals

Geology of Ore Deposits, 2010
Zonal and sectorial monazite-(Ce) crystals from ceramic granite pegmatites of the Adui pluton are enriched in Ce and La, whereas monazite from the miarolitic gemstone pegmatites at the western contact of the pluton are enriched in Nd, Sm, Gd, and Y. This difference is caused by earlier crystallization of ceramic pegmatites and higher temperatures of ...
V. I. Popova, E. I. Churin
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IRRADIATION DAMAGE IN MONAZITE-(Ce): AN EXAMPLE TO ESTABLISH THE LIMITS OF RAMAN CONFOCALITY AND DEPTH RESOLUTION

The Canadian Mineralogist, 2010
Crystals of synthetic monazite-(Ce), and foils of the same material 1 mm thick, were irradiated with 1, 3.5, and 7 MeV Au ions, with total fluences in the range 0.6–51 x 1013 ions/cm2. The triple irradiation resulted in surficial structural damage extending up to ~1.5 mm into the samples.
Nasdala, Lutz, Grötzschel, Rainer, Probst, Sylvio, Bleisteiner, Bernd   +3 more
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Differing responses of zircon, chevkinite-(Ce), monazite-(Ce) and fergusonite-(Y) to hydrothermal alteration: Evidence from the Keivy alkaline province, Kola Peninsula, Russia

Mineralogy and Petrology, 2017
A quartzolite from the Rova occurrence, Keivy alkali granite province, Kola Peninsula, Russia, is used to examine the differing responses of certain rare-metal minerals during interaction with hydrothermal fluids. The minerals are two silicates [chevkinite-(Ce) and zircon], a phosphate [monazite-(Ce)] and an oxide [fergusonite-(Y)].
Ray Macdonald, Bogusław Bagiński, Dmitry Zozulya   +2 more
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High-thorium monazite-(Ce) formed during disequilibrium melting of metapelites under granulite-facies conditions

Mineralogical Magazine, 1995
AbstractMonazite is a light rare-earth element (LREE)-bearing accessory phase common in felsic granitic rocks, and strongly influences LREE concentrations in granites and the chemistry of melts and residues formed during partial melting. Cheralite-rich (high-Th) monazite-(Ce) has been recorded as rims on partially dissolved cores in a suite of ...
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Shock-produced high-pressure (La, Ce, Th)PO4 polymorph revealed by microstructural phase heritage of monazite

Geology, 2019
The responses of uranium-bearing accessory minerals to shock metamorphism have received growing interest, because under extreme pressure and temperature conditions, these phases can form unique microstructures and/or polymorphs and their radiometric ages can be partially to wholly reset.
Erickson, Timmons, Timms, Nick, Pearce, M.A., Cayron, C., Deutsch, A., Keller, L.P., Kring, D.A.   +6 more
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Thermal Conductivity of Monazite‐Type REPO ₄ (RE=La, Ce, Nd, Sm, Eu, Gd)

Journal of the American Ceramic Society, 2009
Low‐thermal conductivity ceramics in monazite‐type REPO 4 (RE=La, Ce, Nd, Sm, Eu, Gd) ceramics are expected to have potential in structural (refractories, thermal insulator) and nuclear applications.
Aibing Du, Chunlei Wan, Zhixue Qu, Wei Pan   +3 more
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Hydrothermal alteration of monazite-(Ce) from the Santa Maria de Itabira pegmatite district (Minas Gerais, Brazil)

1998
Les monazites-(Ce) ont été collectées dans cinq corps pegmatitiques du district de Santa Maria de Itabira (Minas Gerais, Brésil). Les monazites-(Ce) primaires sont riches en thorium et présentent en solution solide de la chéralite et de la huttonite. Une albitisation tardive affecte les pegmatites ; durant ce stade hydrothermal, les monazites-(Ce) s ...
Bilal, Essaid, Marciano, Vitoria, Fuzikawa, Kazuo, Fernando Riffel, Bruno, Nalini Jr., Hermínio Arias, Lourdes Fernandes, Maria, Nasraoui, Mohamed   +6 more
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Gasparite-(Ce) and monazite-(Nd) : two new minerals to the monazite group from the Alps

1987
Graeser, Stefan, Schwander, Hans
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Unusual REE fractionation and occurrence of monazite-(La,Ce) in single monazite grains from a “Central” gold-quartz vein at Muruntau (Uzbekistan)

2022
U. Kempe, T. Graupner, D. Wolf, A.A. Kremenetsky   +3 more
openaire   +1 more source