Crystal structure of the Ca₁₆Ni_173.14In_62.61 compound

Chem. Met. Alloys 7 (2014) 123-131

https://doi.org/10.30970/cma7.0258

Anton KHARKHALIS, Volodymyr BARAN, Ihor MUTS, Viktor HLUKHYY, Thomas F. FÄSSLER, Vasyl’ ZAREMBA

The new ternary indide Ca₁₆Ni_173.14In_62.61 was synthesized from the elements by arc-melting and its crystal structure was determined by means of X-ray single crystal diffraction. The compound crystallizes in its own structure type: space group P2₁/m (No. 11), Z = 1, mP254, a = 1.5374(3) nm, b = 1.6565(9) nm, c = 1.5911(2) nm, β = 115.434(7)º, wR2 = 0.0715, 6674 F² values, 691 variable parameters. The compound Ca₁₆Ni_173.14In_62.61 exists only in as-cast samples and decomposes during annealing at 1070 K with the formation of CaNi_9-xIn_2+x. In the structure of Ca₁₆Ni_173.14In_62.61 the nickel atoms build complex puckered two-dimensional Ni-slabs, which are interconnected along the [110] direction by indium atoms into a [Ni_173.14In_62.61] network, in the cavities of which the calcium atoms are situated.

Cutouts of the nickel (copper) cluster units from structures with high 3d-metal content in AE – 3d-metal – In systems.

Keywords

Indide / Crystal structure / Single crystal