Jasmine N. Millican

CRYSTAL GROWTH AND THE SEARCH FOR HIGHLY CORRELATED INTERMETALLICS

Our interests lie in studying and understanding the structure-property relationships in novel ternary intermetallics synthesized by metallic flux-growth methods. This review highlights the synthesis, structures and physical properties of ternary lanthanide – transition metal – main group element intermetallics (Ln – T – X), where T = Co, Rh, Ir, Ni, Pd, and Pt, and X = Ga, In, Sb and Sn. Several phases will be discussed, including Ln n TIn3 n +2 (n = 1, 2, ∞), CePdGa6, Ce2PdGa12, Ce2PdGa10, LnNiSb3, LnNi1−x Sb2 (x ∼ 0.4) and Ln 3Co4Sn13. In addition, we report the synthesis, structure characterization, and magnetic behavior from single crystals of Ln 3Co4Sn13 (Ln = Pr, Nd, Sm, Gd, Tb).

4-Nitro-1-[(trimethyl-sil-yl)ethyn-yl]benzene: low-temperature polymorph at 100 K.

The title compound, C11H13NO2Si, is a low-temperature form of the previously reported room-temperature structure [Garcia et al. (1998 ▶). Acta Cryst. C54, 489–491]. At 298 K, the material crystallizes in the space group Pnma and occupies a crystallographic mirror plane, but at 100 K the space group changes to P212121, the volume decreases by 5% and the molecule distorts. The greatest molecular distortions from C s symmetry are rotations of the trimethylsilyl and nitro groups by 10.56 (8) and 11.47 (9)°, respectively, to the benzene mean plane. At low temperature, the crystal also becomes an inversion twin, the refined ratio of the twin components being 0.35 (15):0.65 (15).