The crystal structure of a mixed amide-imide phase, 18 RbMgND2ND, has been solved in the orthorhombic space group Pnma (a = 19 9.55256(31), b = 3.70772(11) and c = 10.08308(32) Å). A new metal amide- 20 hydride solid solution, Rb(NH2)xH(1−x), has been isolated and characterized in 21 the entire compositional range. The profound analogies, as well as the subtle 22 differences, with the crystal chemistry of KMgND2ND and K(NH2)xH1−x are 23 thoroughly discussed. This approach suggests that the comparable performances 24 obtained using K- and Rb-based additives for the Mg(NH2)2-2LiH and 2LiNH2− 25 MgH2 hydrogen storage systems are likely to depend on the structural similarities 26 of possible reaction products and intermediates.
Insights into the Rb−Mg−N−H System: an Ordered Mixed Amide/Imide Phase and a Disordered Amide/Hydride Solid Solution
Capurso G;
2018-01-01
Abstract
The crystal structure of a mixed amide-imide phase, 18 RbMgND2ND, has been solved in the orthorhombic space group Pnma (a = 19 9.55256(31), b = 3.70772(11) and c = 10.08308(32) Å). A new metal amide- 20 hydride solid solution, Rb(NH2)xH(1−x), has been isolated and characterized in 21 the entire compositional range. The profound analogies, as well as the subtle 22 differences, with the crystal chemistry of KMgND2ND and K(NH2)xH1−x are 23 thoroughly discussed. This approach suggests that the comparable performances 24 obtained using K- and Rb-based additives for the Mg(NH2)2-2LiH and 2LiNH2− 25 MgH2 hydrogen storage systems are likely to depend on the structural similarities 26 of possible reaction products and intermediates.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
