ChemInform Abstract: The Versatility of Solid-State Metathesis Reactions: From Rare Earth Fluorides to Carbodiimides.

There has been considerable interest over the past several years in materials capable of converting infrared radiation to visible light by means of sequential excitation in two or more steps. Several rare-earth trifluorides (LaF3, YF3, GdF3, and LuF3) containing a small amount of other trivalent rare-earth ions (Yb3+ and Er3+, or Ho3+, or Tm3+) have been found to exhibit such phenomenon. The methods of preparation of these rare-earth fluorides in the crystalline solid form generally involve a co-precipitation process and a subsequent solid state reaction at elevated temperatures. This investigation was undertaken to examine the morphological features of both the precipitated and the thermally treated fluoride powders by both transmission and scanning electron microscopy.Rare-earth oxides of stoichiometric composition were dissolved in nitric acid and the mixed rare-earth fluoride was then coprecipitated out as fine granules by the addition of excess hydrofluoric acid. The precipitated rare-earth fluorides were washed with water, separated from the aqueous solution, and oven-dried.

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Rare-Earth Doped Gallium Nitride (GaN)- An Innovative Path Toward Area-scalable Solid-state High Energy Lasers Without Thermal Distortion

10.21236/ada496417 ◽

2009 ◽

Author(s):

Michael Wraback ◽

Mark Dubinskiy

Keyword(s):

Rare Earth ◽

Gallium Nitride ◽

Solid State ◽

High Energy ◽

Thermal Distortion ◽

High Energy Lasers ◽

Rare Earth Doped

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Rare earth elements recovery from secondary wastes by solid-state chlorination and selective organic leaching

Waste Management ◽

10.1016/j.wasman.2020.12.039 ◽

2021 ◽

Vol 122 ◽

pp. 55-63

Author(s):

S. Pavón ◽

T. Lorenz ◽

A. Fortuny ◽

A.M. Sastre ◽

M. Bertau

Keyword(s):

Rare Earth ◽

Solid State ◽

Rare Earth Elements

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Solid‐State Preparation and Luminescence Investigation of Rare Earth Iodide Carbodiimide Nitrides RE 2 I(CN 2 )N (RE = La, Gd) and LaI(CN 2 )

European Journal of Inorganic Chemistry ◽

10.1002/ejic.202000683 ◽

2020 ◽

Vol 2020 (41) ◽

pp. 3954-3958

Author(s):

Danuta Dutczak ◽

Amira Siai ◽

Markus Ströbele ◽

David Enseling ◽

Thomas Jüstel ◽

...

Keyword(s):

Rare Earth ◽

Solid State ◽

State Preparation ◽

Luminescence Investigation

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Synthesis of new types of complexes by the interaction of rare earth ions with sodium sulfide in solid state in presence of sun light

Progress in Crystal Growth and Characterization of Materials ◽

10.1016/s0960-8974(02)00033-5 ◽

2002 ◽

Vol 45 (1-2) ◽

pp. 97-101 ◽

Cited By ~ 2

Author(s):

Lakshmi S.K. Shukla ◽

S.K. Singh

Keyword(s):

Rare Earth ◽

Solid State ◽

Sodium Sulfide ◽

Rare Earth Ions ◽

Sun Light

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High-pressure Syntheses and Characterization of the Rare-earth Fluoride Borates RE2(BO3)F3 (RE=Tb, Dy, Ho)

Zeitschrift für Naturforschung B ◽

10.5560/znb.2013-3258 ◽

2013 ◽

Vol 68 (11) ◽

pp. 1198-1206 ◽

Cited By ~ 4

Author(s):

Ernst Hinteregger ◽

Michael Enders ◽

Almut Pitscheider ◽

Klaus Wurst ◽

Gunter Heymann ◽

...

Keyword(s):

Crystal Structure ◽

High Pressure ◽

Rare Earth ◽

Monoclinic Space Group ◽

Rare Earth Fluoride ◽

Earth Fluoride ◽

Structure Determinations ◽

New Compounds ◽

Rare Earth Fluorides

The new rare-earth fluoride borates RE2(BO3)F3 (RE=Tb, Dy, Ho) were synthesized under highpressure/ high-temperature conditions of 1:5 GPa=1200 °C for Tb2(BO3)F3 and 3:0 GPa=900 °C for Dy2(BO3)F3 and Ho2(BO3)F3 in a Walker-type multianvil apparatus from the corresponding rareearth sesquioxides, rare-earth fluorides, and boron oxide. The single-crystal structure determinations revealed that the new compounds are isotypic to the known rare-earth fluoride borate Gd2(BO3)F3. The new rare-earth fluoride borates crystallize in the monoclinic space group P21/c (Z = 8) with the lattice parameters a=16:296(3), b=6:197(2), c=8:338(2) Å , b =93:58(3)° for Tb2(BO3)F3, a= 16:225(3), b = 6:160(2), c = 8:307(2) Å , b = 93:64(3)° for Dy2(BO3)F3, and a = 16:189(3), b = 6:124(2), c = 8:282(2) Å , β= 93:69(3)° for Ho2(BO3)F3. The four crystallographically different rare-earth cations (CN=9) are surrounded by oxygen and fluoride anions. All boron atoms form isolated trigonal-planar [BO3]3- groups. The six crystallographically different fluoride anions are in a nearly planar coordination by three rare-earth cations.

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