Crystal structures and hydrogen-induced decomposition of La(Mg1−Al )3 alloys

Synthesis and structural characterization of RE6Cd23T (RE=La–Gd; T=Sn, Sb, Pb, and Bi)

“…Second, we will attempt to form other rare-earth metal and Cd-containing phases by including different elements T than the ones already explored, such that T will have higher electronegativity and enhanced ability to sequester the -surplus‖ electrons from the rare-earth metals. In the context of the 6:23:1 chemistry discussed here, and extrapolating from the phase La 6 Mg 22 Al which has already been described [28], we think it will be worth trying out other substituents and expanding on the 6:22:1 chemistry as well.…”

Thermodynamic and mechanical properties of lanthanum–magnesium phases from density functional theory

“…Of particular interest are their oxidation resistance, high temperature ductility, and low temperature superconductivity [2,3]. Some of the La-Mg compounds have a catalytic effect on hydrogen absorption and desorption in various materials [4][5][6][7][8][9][10][11][12][13]. Other applications include components of switchable or tunable mirrors [14].…”

Crystal Chemistry of RE6MgxCd23–xPb [0.6(1) ≤ x ≤ 3.2(1); RE = La and Ce]. New Mixed‐Metal Derivatives of the RE6Cd23T Phases (T = Group 14/15/16 Element)

“…Such diverse stoichiometries, e.g. La 6 Mg 22 Al and Na 6 Cd 16 Au 7 may not cleanly fit within the Th 6 Mn 23 framework, and are the result of the many different ways the atoms of the chemical elements can be distributed on the available sites. Often, however, as in Er 5 Fe 6 Sn 18 the chemical formula is indicative of varying degree of occupational disorder.…”

“…The large, highly symmetric cubic unit cell of Th 6 Mn 23 contains one Th site (Wyckoff position 24 e ) and four Mn sites (2 × 32 f , 24 d , and 4 a ). Since its discovery, the chemistry within this structure type has proven rich and varied, as shown in the wide array of binary, ternary, and quaternary derivatives that have been discovered so far . This structure type also features a sizeable void at Wyckoff position 4 a .…”