Materials Data on Bi2S by Materials Project
Bi2S crystallizes in the monoclinic P2_1/c space group. The structure is one-dimensional and consists of two Bi2S ribbons oriented in the (1, 0, 0) direction. there are two inequivalent Bi1+ sites. In the first Bi1+ site, Bi1+ is bonded in a distorted single-bond geometry to one S2- atom. The Bi–S bond length is 3.26 Å. In the second Bi1+ site, Bi1+ is bonded in a distorted T-shaped geometry to three equivalent S2- atoms. There are a spread of Bi–S bond distances ranging from 2.64–2.94 Å. S2- is bonded in a distorted rectangular see-saw-like geometry to four Bi1+ atoms.
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