Rare Earth Carbodiimide Silicates: RE2(CN2)(SiO4)

Polymorphous Transformations in Alkaline-Earth Silicates

The role of citric acid in the flotation separation of rare earth from the silicates

Article history: Received 20 August 2014 Accepted 9 February 2015 Available online 3 March 2015

Ferromagnesian postperovskite silicates in the D'' layer of the Earth.

Natural olivine with 12 mol % Fe(2)SiO(4) and synthetic orthopyroxenes with 20% and 40% FeSiO(3) were studied beyond the pressure-temperature conditions of the core-mantle boundary. All samples were found to convert entirely or partially into the CaIrO(3) postperovskite structure, which was recently reported for pure MgSiO(3). The incorporation of Fe greatly reduces the pressure needed for the ...

Spectroscopic studies of metal high-k dielectrics: transition metal oxides and silicates, and complex rare earth/transition metal oxides

G. Lucovsky 1, 2, , J. G. Hong, C. C. Fulton, Y. Zou, R. J. Nemanich, H. Ade, D. G. Scholm, and J. L. Freeouf 5 1 Department of Physics, North Carolina State University, USA 2 Department of Materials Science & Engineering, North Carolina State University, USA 3 Department of Electrical & Computer Engineering, North Carolina State University, USA 4 Department of Materials Science & Engineering, ...

Rare Earth Elements Profile

Definitions and characteristics The rare earth elements (REE) (sometimes referred to as the rare earth metals) are a group of 17 chemically similar metallic elements, including the 15 lanthanides, scandium and yttrium. The lanthanides are elements spanning atomic numbers 57 (lanthanum, La) to 71 (lutetium, Lu) (Table 1). The lanthanides all occur in nature, although promethium, the rarest, only...