A comparison of methods for the estimation of the enthalpy of formation of rare earth compounds

Abstract

Rare earth elements are helping drive the global transition towards a greener economy. However, the way in which they are produced is far from being considered green. One of the...

Facile Synthesis of Anhydrous Rare‐Earth Trichlorides from their Oxides in Chloridoaluminate Ionic Liquids

“…From LaCl 3 to GdCl 3 , the hexagonal UCl 3 structure type (space group P 6 3 / m ) with nine‐coordinated RE 3+ cations is formed. HoCl 3 to LuCl 3 crystallize in the monoclinic YCl 3 type (space group C 2/ m ), in which the cations are coordinated octahedrally [28] . TbCl 3 undergoes a solid‐state phase transition between the hexagonal UCl 3 (below 367 °C) and the orthorhombic PuBr 3 structure type (above 517 °C) with the phase transition temperature depending on the preparation method [30] .…”

Facile Synthesis of Anhydrous Rare‐Earth Trichlorides from their Oxides in Chloridoaluminate Ionic Liquids

“…HoCl 3 to LuCl 3 crystallize in the monoclinic YCl 3 type (space group C2/m), in which the cations are coordinated octahedrally. [28] TbCl 3 undergoes a solid-state phase transition between the hexagonal UCl 3 (below 367 °C) and the orthorhombic PuBr 3 structure type (above 517 °C) with the phase transition temperature depending on the preparation method. [30] In accordance, TbCl 3 obtained by ionothermal reaction showed the low-temperature UCl 3 type.…”

Tb- and Eu-doped yttrium oxyselenides as novel absorber layers for superstrate thin-film photovoltaics: improved spectral optical absorption and green–red phosphor activation

“…This journal is © The Royal Society of Chemistry 2023 materials can be attributed to the atomic and ionic radii of the Y, Tb and Eu whose radii are 178 pm, 180 pm and 199 pm, respectively. 16,33,34 Since the dopants (Tb and Eu) have atomic radius slightly higher than Y, and with all other factors that could affect the size distribution for the nanomaterials relatively constant, this could suggest the plausible reason for the slight increase in the average particle size distribution for the nanomaterials containing Tb and Eu. The difference in the particle size of the materials can also be attributed to the poly-crystalline nature of the materials as seen from the SAED micrographs (see Fig.…”