MENU
The rare earth content of alkali-rich, silica-undersaturated basalts erupted onto oceanic and continental plates is consistent with their derivation by slight amounts of partial melting of hydrous garnet peridotite at the top of the asthenosphere, within the low-velocity, low-Q zone of the mantle. The rare earths are fractionated during partial melting by retention of heavy rare …
Details
The rare earth content of alkali-rich, silica-undersaturated basalts erupted onto oceanic and continental plates is consistent with their derivation by slight amounts of partial melting of hydrous garnet peridotite at the top of the asthenosphere, within the low-velocity, low-Q …
Details 
Rare earth activated alkali-alkaline earth borate phosphors for LEDs and SSLs 4.1. KCaBO 3 The phosphor materials based on borate host matrices have been the topic scientific interest due to their potential applications in optoelectronic research.
Details 
A new geochemical discovery could lead to a cleaner way to extract the rare earth elements needed for the transition to renewable energy. ... but instead include a lot of alkali metals (sodium and ...
Details 
Alkaline-earth metal and rare-earth element incorporation control by ionic radius and growth rate on a stalagmite from the Chauvet Cave, Southeastern France Chem. Geol., 290 ( 2011 ), pp. 1 - 2), 1–11, 10.1016/j.chemgeo.2011.08.006
Details 
The rare earth elements are not as rare in nature as their name implies, but economic deposits with these elements are not common and few deposits have been large producers. In the past 25 years, demand for rare earth elements has increased dramatically because of their wide and diverse use in high-technology applications.
Details 
Homologous Alkali Metal Copper Rare-Earth Chalcogenides A2Cu2nLn4Q7+n (n = 1, 2, 3) Chemistry of Materials ( IF 9.811) Pub Date :, DOI: 10.1021/acs.chemmater.2c00223
Details 
Homologous Alkali Metal Copper Rare-Earth Chalcogenides A 2 Cu 2n Ln 4 Q 7+n (n = 1, 2, 3) Craig C. Laing Department of Chemistry, Northwestern University, Evanston, Illinois …
Details 
Rare earth activated alkali-alkaline earth borate phosphors for LEDs and SSLs4.1. KCaBO 3. The phosphor materials based on borate host matrices have been the topic scientific interest due to their potential applications in optoelectronic research. They have high transparency over a broad spectral range, flexibility in structure and durability ...
Details 
Shibasaki's rare earth alkali metal BINOLate (REMB) catalysts (REMB; RE = Sc, Y, La - Lu; M = Li, Na, K; B = 1,1-bi-2-naphtholate; RE/M/B = 1/3/3) are among the most successful enantioselective catalysts and have been employed in a broad range of mechanistically diverse reactions. Despite the phenom …
Details 
Alkalis and rare earth elements can trace environmental changes in speleothems. • Alkalis are associated with particles from soil or organic ligands depending on the climatic context. • Rare earth elements fractionation can distinguish bedrock or soil contribution. Abstract
Details 
S. Korean scientists develop protein absorbent that collects rare earth elements from steel slag ... but instead include a lot of alkali metals …
Details 
The present invention relates to a rare earth and alkali sulfide, its preparation process and its use as a coloring pigment. This sulfide is characterized in that it corresponds to the formula: ABS2, in which A represents at least one alkali and B at least one rare earth and in that it is made up of grains of average size of at most 1, 5 .mu.m.
Details 
The rare-earth elements (REE), also called the rare-earth metals or (in context) rare-earth oxides, or the lanthanides (though yttrium and scandium are usually included as rare-earths) are a set of 17 nearly-indistinguishable lustrous silvery-white soft heavy metals. Scandium and yttrium are considered rare-earth elements because they tend to occur in the same ore deposits as …
Details 
Shibasaki's rare earth alkali metal BINOLate (REMB) catalysts (REMB; RE = Sc, Y, La – Lu; M = Li, Na, K; B = 1,1-bi-2-naphtholate; RE/M/B = 1/3/3) are among the most successful enantioselective catalysts and have been employed in a broad range of mechanistically diverse reactions. Despite the phenomenal success of these catalysts, several fundamental questions …
Details 
Enriched deposits of rare-earth elements at the surface of the Earth, carbonatites and pegmatites, are related to alkaline plutonism, an uncommon kind of magmatism that occurs in tectonic settings where there is rifting or that are near subduction zones.
Details 
The CO 2 conversion and CO selectivity of alkali and rare earth promoted 5% Ni/Al 2 O 3 catalysts are presented in Fig. 8a–d, respectively. Results showed that addition of rare earth metal or alkali promoters decreased the catalytic activity at 400 °C, but at higher temperatures they exhibited almost the same activity and even higher.
Details 
10%The CO 2 conversion and CO selectivity of alkali and rare earth promoted 5% Ni/Al 2 O 3 catalysts are presented in Fig. 8a–d, respectively. Results showed that addition of rare earth metal or alkali promoters decreased the catalytic activity at 400 °C, but at higher temperatures they exhibited almost the same activity and even higher.
Details 
Concentrations of rare earth, alkali and alkaline earth elements in phenocryst and groundmass components of pyroclastic dacites have been measured. Mafic mineral rare-earth partition coefficients are much larger in these dacites than in more basic rocks. This may be due to differences in host ion concentrations in basic and acidic magmas.
Details 
"The 1.6 kilometer step out along the Cadillac Break could potentially be a massive rare earth and alkali metals mineralized zone yet to be discovered which would greatly impact the value of the property. The company has 5.5 kilometers of east-west strike length to further explore along the Cadillac Break.
Details Copyright © 2022 Shibang Industry & Technology Group Co., Ltd.sitemap
