New alkoxides of copper and the alkaline and alkaline-earth metals. Crystal structure of Na2Cu[OCH(CF3)2]4

1991 ◽  
Vol 30 (13) ◽  
pp. 2812-2819 ◽  
Author(s):  
A. P. Purdy ◽  
C. F. George ◽  
J. H. Callahan
Keyword(s):  
Crystal Structure ◽  
Alkaline Earth ◽  
Alkaline Earth Metals

Analysis of the environment of beryllium, magnesium and alkaline earth atoms in oxygen-containing compounds

1999 ◽  
Vol 55 (2) ◽  
pp. 139-146 ◽  
Author(s):  
V. A. Blatov ◽  
L. V. Pogildyakova ◽  
V. N. Serezhkin
Keyword(s):  
Crystal Structure ◽  
Alkaline Earth ◽  
Organometallic Compounds ◽  
Alkaline Earth Metals ◽  
The Other ◽  
Crystal Chemical ◽  
Coordination Polyhedra ◽  
Coordination Numbers ◽  
Coordination Spheres

About 2100 inorganic and organometallic compounds containing beryllium, magnesium and alkaline earth atoms (M) were investigated with Voronoi–Dirichlet polyhedra (VDPs). It is shown that the coordination numbers (CNs) of the M atoms in MO n coordination polyhedra can be determined by means of VDPs without crystal-chemical radii. The distributions of the M—O distances in the coordination spheres of the M atoms are bimodal for M = Be or Mg and monomodal for the other alkaline earth metals. Beryllium and magnesium coordination polyhedra containing weak M—O contacts were classified by variants of their distortions. It is found that the volume of the domains of the Mg, Ca, Sr and Ba atoms is independent of their CNs at CN \ge 6 (up to 16 for barium). The possibility of using the model of deformable spheres to describe the crystal structure of the compounds investigated is suggested.

scholarly journals Solid State Hydrogen Storage in Alanates and Alanate-Based Compounds: A Review

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 567 ◽  
Author(s):  
Chiara Milanese ◽  
Sebastiano Garroni ◽  
Fabiana Gennari ◽  
Amedeo Marini ◽  
Thomas Klassen ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Hydrogen Absorption ◽  
Alkaline Earth ◽  
Molecular Form ◽  
Alkaline Earth Metals ◽  
Highly Porous Materials ◽  
Physico Chemical ◽  
Solid Form ◽  
Highly Porous

The safest way to store hydrogen is in solid form, physically entrapped in molecular form in highly porous materials, or chemically bound in atomic form in hydrides. Among the different families of these compounds, alkaline and alkaline earth metals alumino-hydrides (alanates) have been regarded as promising storing media and have been extensively studied since 1997, when Bogdanovic and Schwickardi reported that Ti-doped sodium alanate could be reversibly dehydrogenated under moderate conditions. In this review, the preparative methods; the crystal structure; the physico-chemical and hydrogen absorption-desorption properties of the alanates of Li, Na, K, Ca, Mg, Y, Eu, and Sr; and of some of the most interesting multi-cation alanates will be summarized and discussed. The most promising alanate-based reactive hydride composite (RHC) systems developed in the last few years will also be described and commented on concerning their hydrogen absorption and desorption performance.

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