Defect structure of cubic solid solutions of alkaline earth and rare earth fluorides

1996 ◽  
Vol 139 (2) ◽  
pp. 125-145 ◽  
Author(s):  
H. W. Den Hartog
Keyword(s):  
Rare Earth ◽  
Solid Solutions ◽  
Defect Structure ◽  
Alkaline Earth ◽  
Rare Earth Fluorides

scholarly journals NMR parameters in alkali, alkaline earth and rare earth fluorides from first principle calculations

2011 ◽  
Vol 13 (41) ◽  
pp. 18539 ◽  
Author(s):  
Aymeric Sadoc ◽  
Monique Body ◽  
Christophe Legein ◽  
Mamata Biswal ◽  
Franck Fayon ◽  
...  
Keyword(s):  
Rare Earth ◽  
Alkaline Earth ◽  
First Principle ◽  
First Principle Calculations ◽  
Nmr Parameters ◽  
Rare Earth Fluorides

Characterization of Rare-Earth Fluoride Anti-Stokes Phosphors by Scanning arid Transmission Electron Microscopy

1971 ◽  
Vol 29 ◽  
pp. 142-143
Author(s):  
N. M. P. Low ◽  
L. E. Brosselard
Keyword(s):  
Electron Microscopy ◽  
Rare Earth ◽  
Elevated Temperatures ◽  
Stoichiometric Composition ◽  
Rare Earth Ions ◽  
Crystalline Solid ◽  
Precipitation Process ◽  
Rare Earth Fluoride ◽  
Earth Fluoride ◽  
Rare Earth Fluorides

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.

Phase composition of modern microcrystalline modifiers containing silicon, alkaline earth and rare earth metals

2020 ◽  
pp. 25-34
Author(s):  
V. P. Ermakova ◽  
◽  
S. Yu. Melchakov ◽  
V. G. Smirnova ◽  
L. A. Ovchinnikova ◽  
...  
Keyword(s):  
Rare Earth ◽  
Phase Composition ◽  
Alkaline Earth ◽  
Rare Earth Metals

Phase selectivity and tunable photophysical nature of rare earth metal–organic frameworks of EuxY1−x-PTC (H3PTC = 2,4,6-pyridine tricarboxylic acid; x = 0–1)

2020 ◽  
Vol 49 (42) ◽  
pp. 14985-14994
Author(s):  
Xu-Sheng Gao ◽  
Mei-Juan Ding ◽  
Jin Zhang ◽  
Li-Duo Zhao ◽  
Xiao-Ming Ren
Keyword(s):  
Rare Earth ◽  
Solid Solutions ◽  
Rare Earth Metal ◽  
Metal Organic Frameworks ◽  
Earth Metal ◽  
Tricarboxylic Acid ◽  
Excitation Wavelength ◽  
Metal Organic ◽  
Phase Selectivity

All solid solutions (EuxY1−x-PTC, x = 0.013–0.82) are isomorphic to Eu-PTC, but different from Y-PTC, and show phase selectivity as well as excitation wavelength dependent emission.

ChemInform Abstract: RADIOCRYSTALLOGRAPHIC AND OPTICAL STUDY OF DOUBLE RARE EARTH AND ALKALINE EARTH GALLATES

1978 ◽  
Vol 9 (5) ◽  
Author(s):  
NGUYEN-TRUT-DINH NGUYEN-TRUT-DINH ◽  
G. LE FLEM ◽  
J. FAVA ◽  
A. DAOUDI ◽  
G. DEMAZEAU
Keyword(s):  
Rare Earth ◽  
Alkaline Earth ◽  
Optical Study
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