Results 21 to 30 of about 2,456 (203)

MINERALOGY AND GEOCHEMISTRY OF CHLORITHOLITES FROM THE NEPRYAKHINO GOLD FIELD, SOUTH URALS [PDF]

open access: yesМинералогия, 2020
The chlorite rocks (chloritolites) exposed in a bedrock of the Mokhovoe boloto (Moss swamp) gold placer (East Uralian Megazone, South Urals), which occurs on ultramafic rocks, are studied.
V.V. Murzin, D.A. Varlamov
doaj   +1 more source

Metamict zircon from Mozambique [PDF]

open access: yesBulletin of the Geological Society of Finland, 1985
Metamict zircon from granite pegmatites of Zambézia, Mozambique has been studied by annealing, microprobe, X-ray diffraction, DT and TG analysis, and IR spectroscopy. The specimens are contaminated by epitaxially intergrown xenotime.
R. Törnroos
doaj   +1 more source

Shock deformation microstructures in xenotime from the Spider impact structure, Western Australia

open access: yes, 2021
The rare earth element-bearing phosphate xenotime (YPO4) is isostructural with zircon, and therefore it has been predicted that xenotime forms similar shock deformation microstructures. However, systematic characterization of the range of microstructures
Cox, Morgan A.   +15 more
core   +2 more sources

Nanoscale geochemistry and geochronology of xenotime: application to Earth sciences [PDF]

open access: yes, 2023
The PhD project titled ‘Nanoscale geochemistry and geochronology of xenotime: application to Earth sciences’ aims at identifying and understanding mineralogical mechanisms that impact geochronometers at the nanoscale. The project focuses on the nanoscale
Joseph, Cilva
core   +1 more source

Anatomy of intergrowth OF florencite and xenotime crystals with oscillatory zoning from veins of the svodovy au-ree occurrence, subpolar u [PDF]

open access: yesМинералогия, 2020
The morphology and anatomy of a paragenetic intergrowth of REE minerals (xenotime and florencite) from veins of Svodovy Au-REE occurrence (Subpolar Urals) are described.
S.A. Repina, V.A. Muftakhov
doaj   +1 more source

Preparation and characterization of PbTi0(3) ceramics modified by a natural mixture of rare earth oxides of xenotime [PDF]

open access: yesMaterials Research, 2013
Lead titanate ceramics modified by xenotime (Xm) with nominal composition (Pb, Xm)TiO3, Xm 10 or 15 mol %, were prepared by the conventional oxide mixture technique. Xenotime is a natural mineral consisting of a mixture of rare earth oxides.
Jair Baltazar-Rodrigues   +4 more
doaj   +2 more sources

THORIUM, URANIUM AND RARE EARTH MINERALIZATION IN ROCKS OF THE UGAKHAN GOLD DEPOSIT, BODAIBO ORE REGION [PDF]

open access: yesМинералогия, 2021
The paper reports on the results of studies of ore-bearing rocks of the Ugakhan gold deposit (Bodaybo district): metasandstones, metasiltstones and carbonaceous shales.
E.V. Shepel   +3 more
doaj   +1 more source

Palaeoproterozoic prograde metasomatic-metamorphic overprint zones in Archean tonalitic gneisses, eastern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1999
Several occurrences of coarse-grained kyanite rocks are exposed in the Archaean area of eastern Finland in zones trending predominantly northwest-southeast that crosscut all the Archaean structures and, locally, the Palaeoproterozoic metadiabase dykes ...
M. Pajunen, M. Poutiainen
doaj   +1 more source

A Spectroscopic Investigation of Eu3+ Incorporation in LnPO4 (Ln = Tb, Gd1-xLux, X = 0.3, 0.5, 0.7, 1) Ceramics

open access: yesFrontiers in Chemistry, 2019
We have investigated the incorporation of the luminescent Eu3+ cation in different LnPO4 (Ln = Tb, Gd1−xLux, x = 0.3, 0.5, 0.7, 1) host phases. All samples were analyzed with powder X-ray diffraction (PXRD), Raman spectroscopy, and site-selective time ...
Henry Lösch   +7 more
doaj   +1 more source

Investigation of the Microstructure of Fine-Grained YPO4:Gd Ceramics with Xenotime Structure after Xe Irradiation

open access: yesCeramics, 2022
This paper reports on the preparation of xenotime-structured ceramics using the Spark Plasma Sintering (SPS) method. Y0.95Gd0.05PO4 (YPO4:Gd) phosphates were obtained using the sol-gel method.
Dmitriy A. Mikhaylov   +11 more
doaj   +1 more source

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