Uniform Alkaline Earth Fluoride Nanocrystals with Diverse Shapes Grown from Thermolysis of Metal Trifluoroacetates in Hot Surfactant Solutions

2009 ◽  
Vol 9 (4) ◽  
pp. 2013-2019 ◽  
Author(s):  
Ya-Ping Du ◽  
Xiao Sun ◽  
Ya-Wen Zhang ◽  
Zheng-Guang Yan ◽  
Ling-Dong Sun ◽  
...  
Keyword(s):  
Alkaline Earth ◽  
Surfactant Solutions ◽  
Earth Fluoride ◽  
Alkaline Earth Fluoride ◽  
Metal Trifluoroacetates

Indentation studies on alkaline earth fluoride crystals at elevated temperatures

Pramana ◽  
1990 ◽  
Vol 34 (2) ◽  
pp. 151-156 ◽  
Author(s):  
K Kishan Rao ◽  
D B Sirdeshmukh
Keyword(s):  
Alkaline Earth ◽  
Elevated Temperatures ◽  
Earth Fluoride ◽  
Alkaline Earth Fluoride ◽  
Fluoride Crystals

scholarly journals Calorimetric and Spectroscopic Studies of Water Adsorption onto Alkaline Earth Fluorides

2005 ◽  
Vol 23 (6) ◽  
pp. 425-436
Author(s):  
Toshinori Mori ◽  
Yasushige Kuroda ◽  
Ryotaro Kumashiro ◽  
Koji Hirata ◽  
Hidehiro Toyota ◽  
...  
Keyword(s):  
Alkaline Earth ◽  
Water Adsorption ◽  
Adsorbed Water ◽  
Spectroscopic Studies ◽  
Water Molecules ◽  
Earth Fluoride ◽  
Alkaline Earth Fluoride ◽  
Pretreatment Temperature ◽  
Argon Adsorption ◽  
Ir Bands

Interactions between the surfaces of alkaline earth fluorides (CaF2, SrF2 and BaF2) and water molecules were investigated by calorimetric and spectroscopic methods. The exposed surfaces of the alkaline earth fluoride samples, with which the (100) crystalline plane is mainly associated, were found to be fully covered with strongly adsorbed water molecules, resulting in characteristic IR bands at 3684, 2561, 1947 and 1000 cm−1, respectively. This surface was homogeneous towards further water adsorption. The strongly adsorbed water molecules were almost completely desorbed from the surface on evacuating the sample up to 473 K. The heat of immersion in water also increased with increasing pretreatment temperature; this may be attributed to surface rehydration of the alkaline earth fluorides. The state of the surface changed drastically as the pretreatment temperature was increased and stabilized towards incoming water molecules. Thus, the surface formed after evacuation at temperatures greater than 473 K was resistant to hydration even after immersion in water at room temperature. This surface was relatively heterogeneous towards water adsorption, although it behaved homogeneously towards argon adsorption. These facts indicate that strongly adsorbed water molecules appear to be somewhat specific towards the adsorption of further incoming water molecules. The adsorption properties of the (100) plane of alkaline earth fluorides towards water and argon molecules depend strongly on both the electrostatic field strength and the extent of rehydration of the alkaline earth fluoride surface.

Epitaxial relations in alkaline earth fluoride–semiconductor systems

1984 ◽  
Vol 2 (2) ◽  
pp. 415-417 ◽  
Author(s):  
Julia M. Phillips ◽  
C. J. Yashinovitz
Keyword(s):  
Alkaline Earth ◽  
Earth Fluoride ◽  
Alkaline Earth Fluoride

Effect of alkali and alkaline earth fluoride introduction on thermal stability and structure of fluorophosphate glasses

2006 ◽  
Vol 98 (1) ◽  
pp. 154-158 ◽  
Author(s):  
Meisong Liao ◽  
Hongtao Sun ◽  
Lei Wen ◽  
Yongzheng Fang ◽  
Lili Hu
Keyword(s):  
Thermal Stability ◽  
Alkaline Earth ◽  
Earth Fluoride ◽  
Alkaline Earth Fluoride

Charge-transfer bands in alkaline-earth fluoride crystals doped by Eu3+ or Y b3+ ions

2008 ◽  
Vol 146 (9-10) ◽  
pp. 376-379 ◽  
Author(s):  
E. Radzhabov ◽  
A. Nepomnyashchikh
Keyword(s):  
Charge Transfer ◽  
Alkaline Earth ◽  
Earth Fluoride ◽  
Alkaline Earth Fluoride ◽  
Fluoride Crystals
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