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Mostrando ítems 1271-1280 de 3704
Trace elements, rare earth elements and scandium concentration in a weathering profile of metaultramafic rock (Bom Jesus da Penha, Minas Gerais, Brazil)Concentração de elementos traços, terras raras e escândio em perfil de intemperismo de rocha metaultramáfica (Bom Jesus da Penha, Minas Gerais)
(2018-07-24)
The development of lateritic horizons is responsible for chemical and mineralogical reorganization in the parent rock. The final arrangement is controlled by the primary composition of the parent material, climate conditions, ...
Rare earth and zinc layered hydroxide salts intercalated with the 2-aminobenzoate anion as organic luminescent sensitizer
(2015)
Rare earth (RE = Eu, Y and Tb) and zinc layered hydroxide salts intercalated with nitrate anions were synthesized, followed by exchange with 2-aminobenzoate. The obtained compounds were characterized by powder X-ray ...
Rare earth and zinc layered hydroxide salts intercalated with the 2-aminobenzoate anion as organic luminescent sensitizer
(2015)
Rare earth (RE = Eu, Y and Tb) and zinc layered hydroxide salts intercalated with nitrate anions were synthesized, followed by exchange with 2-aminobenzoate. The obtained compounds were characterized by powder X-ray ...
Low-temperature magnetic behavior of the rare-earth cobaltites GdCoO 3 and SmCoO3
(2007)
The temperature and magnetic field dependences of the static magnetization of the polycrystalline rare-earth cobaltites GdCoO3 and SmCoO 3 have been measured. It is shown that, below room temperature, the magnetization of ...
Estudio conceptual con simulación geoestadística para valorar blancos de exploración de elementos de tierras raras (REE) en el departamento de Antioquia, Colombia
(Universidad Nacional de ColombiaMedellín - Minas - Maestría en Ingeniería - Recursos MineralesDepartamento de Materiales y MineralesFacultad de MinasMedellín, ColombiaUniversidad Nacional de Colombia - Sede Medellín, 2022)
Los estudios conceptuales son generalmente la primera valoración económica de un proyecto minero. Bajo este contexto, el objetivo principal de este trabajo es formular un estudio técnico y económico de la viabilidad potencial ...
Seismic response of retaining walls with cohesive backfill: Centrifuge model studies
(2016)
Observations from recent earthquakes show that retaining structures with non-liquefiable backfills perform extremely well; in fact, damage or failures related to seismic earth pressures are rare. The seismic response of a ...
Matrizes semicondutoras GaAs e Sn'X IND. 2' dopado com terras-raras Ce ou Eu: investigação do transporte elétrico
(Universidade Estadual Paulista (UNESP), 2014)
Charge compensation in RE3+ (RE = Eu, Gd) and M+ (M = Li, Na, K) co-doped alkaline earth nanofluorides obtained by microwave reaction with reactive ionic liquids leading to improved optical properties
(Royal Society of Chemistry - RSCCambridge, 2014)
Alkaline earth fluorides are extraordinarily promising host matrices for phosphor materials with regard to rare earth doping. In particular, quantum cutting materials, which might considerably enhance the efficiency of ...