Syntheses and Structure of Er6Co2.19(1)In0.81(1)

Osmium and magnesium: structural segregation in the rare earth-rich intermetallics RE 4OsMg (RE=La–Nd, Sm) and RE 9 TMg4 (RE=Gd, Tb)

“…The systematic extinctions of the Gd 9 OsMg 4 data set indicated space group P6 3 /mmc, similar to the RE 9 TMg 4 series [5]. The starting atomic parameters were deduced by the charge-flipping algorithm [9] of Superflip [10] and the structure refinements based on F 2 were performed with the Jana2006 [11] [12]. In the present case this leads to twins of fourlings [13] but only five domains could be found in the refined ratio of 0.461(9):0.436(9):0.023(1):0.042(1):0.038 (1).…”

Rare Earth-rich Cadmium Compounds RE4TCd (T = Ni, Pd, Ir, Pt)

“…They compare well with the Cd-Cd distances in hcp cadmium (6 × 298 and 6 × 329 pm) [17], and one can assume substantial Cd-Cd bonding within these units, similar to the observations Table 2. Crystal data and structure refinement for Gd 4 (2) made with the magnesium compounds [3,5]. Further investigations with gallium and zinc are in progress in order to check the formation of X 4 tetrahedra with these elements in RE 4 T X compounds.…”

“…Voids within this rigid network are filled by In 4 tetrahedra, a structural building unit which is also known in molecular structures and some Zintl phases. With indium as the main group component, this structure type also exists for the series of RE 4 IrIn compounds [2].…”

Crystal structure of RE12Fe2+xPb3−x (RE=Tm, Lu) compounds

“…For example, compounds crystallizing in the Sm 12 Ni 6 In (space group Im3, Pearson code cI38) [1], Ho 6 Co 2 Ga (space group Immm, Pearson code oI36) [2] and Er 12 Fe 2 In 3 (space group I4/mmm, Pearson code tI34) [3] structure types form homological series RE 3(x+y) T 2x X y (X = In, Pb; x-number of RE 3 T 2 fragments, y-number of RE 3 X fragments). The compounds with the Sm 12 Ni 6 In structure type were revealed in some RE-{Co, Ni}-In [1] and RE-{Co, Ni}-Pb [4] systems, the compounds crystallizing in the Ho 6 Co 2 Ga structure type were found in the RE-Co-In [5][6][7] and RE-{Co, Ni}-Pb [8,9] systems. The compounds with the Er 12 Fe 2 In 3 structure exist only in the systems RE-Fe-In [3].…”

“…RBragg = 7.50%, RF = 4.47%. For Lu5Pb3: a = 8.7452(7), c = 6.4336(6) Å. xR1 = 0.2359(7); x Pb = 0.6045(6). RBragg = 5.17%, RF = 3.54%).b Lu (Mg structure type; space group P63/mmc; Z = 2; a = 3.5110(4), c = 5.5719(3) Å. Lu: 2c 1/3 2/3 1/4.…”