Na₃MgB₃₇Si₉: an icosa-hedral B₁₂ cluster framework containing {Si₈} units.

ABSTRACT: Single crystals of a novel sodium-magnesium boride silicide, Na₃MgB₃₇Si₉ [a = 10.1630 (3) Å, c = 16.5742 (6) Å, space group R m (No. 166)], were synthesized by heating a mixture of Na, Si and crystalline B with B₂O₃ flux in Mg vapor at 1373 K. The Mg atoms in the title compound are located at an inter-stitial site of the Dy_2.1B₃₇Si₉-type structure with an occupancy of 0.5. The (001) layers of B₁₂ icosa-hedra stack along the c-axis direction with shifting in the [-a/3, b/3, c/3] direction. A three-dimensional framework structure of the layers is formed via B-Si bonds and {Si₈} units of [Si]₃-Si-Si-[Si]_3</

SUBMITTER: Morito H 

PROVIDER: S-EPMC8819436 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature