LiBSi₂: A tetrahedral semiconductor framework from boron and silicon atoms bearing lithium atoms in the channels

Silicon swallows up boron: The novel open tetrahedral framework structure (OTF) of the Zintl phase LiBSi₂ was made by applying high pressure to a mixture of LiB and elemental silicon. The compound represents a new topology in the B-Si net (called tum), which hosts Li atoms in the channels (see picture). LiBSi₂ is the first example where B and Siatoms form an ordered common framework structure with B engaged exclusively in heteronuclear B-Si contacts.