Coordination numbers of alkali metal ions in aqueous solutions

2006 ◽  
Vol 124 (3) ◽  
pp. 192-199 ◽  
Author(s):  
Sameer Varma ◽  
Susan B. Rempe
Keyword(s):  
Alkali Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Alkali Metal Ions ◽  
Coordination Numbers

scholarly journals Mobility of hydrated alkali metal ions in metallosupramolecular ionic crystals

2019 ◽  
Vol 10 (2) ◽  
pp. 587-593 ◽  
Author(s):  
Nobuto Yoshinari ◽  
Satoshi Yamashita ◽  
Yosuke Fukuda ◽  
Yasuhiro Nakazawa ◽  
Takumi Konno
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Alkali Metal Ions ◽  
Ionic Crystals ◽  
Ionic Solids ◽  
Ion Conducting

The ion-conducting behaviour of alkali metal ions in ionic solids (M6[1]·nH2O) resembles that in aqueous solutions; the solid-state conductivities increase in the order of M = Li+ < Na+ < K+.

The Impact of Different Alkali Metal Ions on Photoluminescence Properties of Ca10M(PO4)7:Eu2+ (M: Li, Na, K)

2018 ◽  
Vol 914 ◽  
pp. 80-86
Author(s):  
Jian Wen Zhao ◽  
Jun Dong ◽  
Jian Zhou ◽  
Xiao Qiang Wen ◽  
Shu Zhong Yang ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Emission Spectra ◽  
Alkali Metal Ions ◽  
Excitation Spectra ◽  
Coordination Numbers ◽  
Crystal Fields ◽  
Host Lattices ◽  
Luminescent Centers ◽  
The Impact

A series of novel luminescent materials Ca10M(PO4)7:Eu2+(M: Li, Na, K) were synthesized by the solid-state reaction. The previous literatures indicate that the doped different alkali metal ions can only lead to regular shift of the emission and excitation spectra. Howerver, in this paper, we found the result that these three kinds of phosphors showed huge differences between the emission spectra intensity as well as the positions of the excitation and emission spectra peaks. No any regulars can be found. In order to explore it, crystal structure, the performance of photoluminescence spectra and CIE coordinates have been systematically investigated and discussed. In Ca10Li (PO4)7, Ca10Na (PO4)7and Ca10K(PO4)7host lattices, the positions of the cations are different, leading to three different crystal structures. Besides, the coordination conditions of the luminescent centers Eu2+ions are also changed by the incorporation of the alkali metal ions. Thus the enormous disparity on the luminescence intensity as well as the excitation and emission peak positions may be ascribed to these three quite different crystal fields and different coordination numbers of the luminescent central ion in the Ca10M(PO4)7:Eu2+(M: Li, Na, K) phosphors.

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