ChemInform Abstract: Vibrational Modes and Structure of Rare Earth Halide-Alkali Halide Binary Melts YBr3- LMBr (LM: Li, K, Cs) and YF3-KF.

ChemInform ◽  
2010 ◽  
Vol 28 (44) ◽  
pp. no-no
Author(s):  
V. DRACOPOULOS ◽  
B. GILBERT ◽  
B. BOERRENSEN ◽  
G. M. PHOTIADIS ◽  
G. N. PAPATHEODOROU
Keyword(s):  
Rare Earth ◽  
Alkali Halide ◽  
Vibrational Modes

Vibrational modes and structure of rare earth halide–alkali halide binary melts YBr3–ABr (A=Li, K, Cs) and YF3–KF

1997 ◽  
Vol 93 (17) ◽  
pp. 3081-3088 ◽  
Author(s):  
V. Dracopoulos ◽  
B. Gilbert ◽  
B. Brrensen ◽  
G. M. Photiadis ◽  
G. N. Papatheodorou
Keyword(s):  
Rare Earth ◽  
Alkali Halide ◽  
Vibrational Modes

Theoretical Study of Mixed LiLnX4(Ln = La, Dy; X = F, Cl, Br, I) Rare Earth/Alkali Halide Complexes

2000 ◽  
Vol 39 (26) ◽  
pp. 6001-6008 ◽  
Author(s):  
Cornelis Petrus Groen ◽  
Ad Oskam ◽  
Attila Kovács
Keyword(s):  
Rare Earth ◽  
Alkali Halide ◽  
Theoretical Study ◽  
Halide Complexes

Structure of Rare-earth/Alkali Halide Complexes

2001 ◽  
Vol 56 (11) ◽  
pp. 721-724 ◽  
Author(s):  
Z. Akdeniz ◽  
Z. Çiçek Önem ◽  
M. P. Tosia
Keyword(s):  
Rare Earth ◽  
Alkali Halide ◽  
Elevated Temperatures ◽  
Alkali Halides ◽  
Energy Difference ◽  
Alkali Atom ◽  
Complexing Agent ◽  
Coordination State ◽  
Rare Earth Atom ◽  
The Rare Earth

Abstract Vapour complex formation of rare-earth halides with alkali halides strongly increases the volatility of these compounds. We evaluate the structure taken by such complexes having the chemical formulas MRX4, M2RX5 and M3RX6, where X = F or Cl and typically M = Li or Na and R = La. The roles played by the two types of metal atom is investigated in MRX4 complexes by also taking M = K, Rb or Cs and R = Gd or Lu. The main predictions that emerge from our calculations are as follows: (i) in MRX4 a fourfold coordination of the rare-earth atom is accompanied by twofold or threefold coordination of the alkali atom, the energy difference in favour of the twofold-coordination state being about 0.3 eV in the case of the LiF complexing agent but even changing sign as the ionic radius of either the alkali or the halogen is increased; (ii) in M2RX5 a fivefold coordination of the rare-earth atom is energetically more stable than a fourfold one, by again not more than about 0.3 eV; (iii) in M3RX6 the fivefold and sixfold coordinations of the rare-earth atom are energetically competitive; and (iv) in both M2RX5 and M3RX6 each coordination state can be realized in various forms that differ in detail but are close in energy. Bond fluctuations and disorder around the rare-earth atom can be expected to be a general feature at elevated temperatures, both in the vapour and in liquid rare-earth/alkali halide mixtures.

scholarly journals One-Dimensional Quaternary and Penternary Alkali Rare Earth Thiophosphates Obtained via Alkali Halide Flux Crystal Growth

2019 ◽  
Vol 19 (10) ◽  
pp. 5648-5657 ◽  
Author(s):  
Mohammad Usman ◽  
Mark D. Smith ◽  
Vladislav V. Klepov ◽  
Hans-Conrad zur Loye
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
Alkali Halide ◽  
One Dimensional

Vibrational modes of rare-earth formates

2009 ◽  
Vol 40 (8) ◽  
pp. 954-957 ◽  
Author(s):  
E. N. Silva ◽  
M. R. Moura ◽  
A. P. Ayala ◽  
I. Guedes ◽  
G. Polla ◽  
...  
Keyword(s):  
Rare Earth ◽  
Vibrational Modes

scholarly journals Molten Alkali Halide Flux Growth of an Extensive Family of Noncentrosymmetric Rare Earth Sulfides: Structure and Magnetic and Optical (SHG) Properties

2019 ◽  
Vol 58 (13) ◽  
pp. 8541-8550 ◽  
Author(s):  
Mohammad Usman ◽  
Mark D. Smith ◽  
Gregory Morrison ◽  
Vladislav V. Klepov ◽  
Weiguo Zhang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Alkali Halide ◽  
Flux Growth ◽  
Extensive Family
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