Materials Data on InBi3Te4 by Materials Project

Abstract

(InBi2Te3)2InBi5Te6 is MAX Phase-like structured and crystallizes in the triclinic P1 space group. The structure is two-dimensional and consists of one InBi2Te3 sheet oriented in the (0, 0, 1) direction and one InBi5Te6 sheet oriented in the (0, 0, 1) direction. In the InBi2Te3 sheet, there are two inequivalent In1+ sites. In the first In1+ site, In1+ is bonded to six Te2- atoms to form InTe6 octahedra that share corners with three equivalent BiTe6 octahedra, edges with three BiTe6 octahedra, and edges with six InTe6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of In–Te bond distances ranging from 2.95–3.29 Å. In the second In1+ site, In1+ is bonded to six Te2- atoms to form InTe6 octahedra that share corners with three equivalent BiTe6 octahedra, edges with three BiTe6 octahedra, and edges with six InTe6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of In–Te bond distances ranging from 2.95–3.29 Å. There are four inequivalent Bi+2.33+ sites. In the first Bi+2.33+ site, Bi+2.33+ is bonded in a 3-coordinate geometry to three Te2- atoms. There are a spread of Bi–Te bond distances ranging from 3.57–3.61 Å. In the second Bi+2.33+ site, Bi+2.33+ is bonded in a 3-coordinate geometry to three Te2- atoms. There are two shorter (3.57 Å) and one longer (3.61 Å) Bi–Te bond lengths. In the third Bi+2.33+ site, Bi+2.33+ is bonded to six Te2- atoms to form BiTe6 octahedra that share corners with three equivalent InTe6 octahedra, edges with three InTe6 octahedra, and edges with six BiTe6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Bi–Te bond distances ranging from 3.11–3.30 Å. In the fourth Bi+2.33+ site, Bi+2.33+ is bonded to six Te2- atoms to form BiTe6 octahedra that share corners with three equivalent InTe6 octahedra, edges with three InTe6 octahedra, and edges with six BiTe6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Bi–Te bond distances ranging from 3.12–3.29 Å. There are six inequivalent Te2- sites. In the first Te2- site, Te2- is bonded to three In1+ and three Bi+2.33+ atoms to form TeIn3Bi3 octahedra that share corners with three equivalent TeBi6 octahedra and edges with nine TeIn3Bi3 octahedra. The corner-sharing octahedral tilt angles are 4°. In the second Te2- site, Te2- is bonded to three In1+ and three Bi+2.33+ atoms to form TeIn3Bi3 octahedra that share corners with three equivalent TeBi6 octahedra and edges with nine TeIn3Bi3 octahedra. The corner-sharing octahedral tilt angles are 4°. In the third Te2- site, Te2- is bonded in a 3-coordinate geometry to three In1+ atoms. In the fourth Te2- site, Te2- is bonded in a 3-coordinate geometry to three In1+ atoms. In the fifth Te2- site, Te2- is bonded to six Bi+2.33+ atoms to form TeBi6 octahedra that share corners with three equivalent TeIn3Bi3 octahedra and edges with nine TeBi6 octahedra. The corner-sharing octahedral tilt angles are 4°. In the sixth Te2- site, Te2- is bonded to six Bi+2.33+ atoms to form TeBi6 octahedra that share corners with three equivalent TeIn3Bi3 octahedra and edges with nine TeBi6 octahedra. The corner-sharing octahedral tilt angles are 4°. In the InBi5Te6 sheet, In1+ is bonded to six Te2- atoms to form InTe6 octahedra that share corners with three equivalent BiTe6 octahedra, edges with two equivalent InTe6 octahedra, and edges with seven BiTe6 octahedra. The corner-sharing octahedral tilt angles are 2°. There are a spread of In–Te bond distances ranging from 2.97–3.30 Å. There are five inequivalent Bi+2.33+ sites. In the first Bi+2.33+ site, Bi+2.33+ is bonded to six Te2- atoms to form BiTe6 octahedra that share corners with three equivalent BiTe6 octahedra, edges with four equivalent InTe6 octahedra, and edges with five BiTe6 octahedra. The corner-sharing octahedra tilt angles range from 1–2°. There are a spread of Bi–Te bond distances ranging from 3.06–3.32 Å. In the second Bi+2.33+ site, Bi+2.33+ is bonded in a 3-coordinate geometry to three Te2- atoms. There are two shorter (3.58 Å) and one longer (3.60 Å) Bi–Te bond lengths. In the third Bi+2.33+ site, Bi+2.33+ is bonded in a 3-coordinate geometry to three Te2- atoms. There are two shorter (3.57 Å) and one longer (3.61 Å) Bi–Te bond lengths. In the fourth Bi+2.33+ site, Bi+2.33+ is bonded to six Te2- atoms to form BiTe6 octahedra that share corners with three equivalent BiTe6 octahedra, edges with two equivalent InTe6 octahedra, and edges with seven BiTe6 octahedra. The corner-sharing octahedra tilt angles range from 1–2°. There are a spread of Bi–Te bond distances ranging from 3.11–3.25 Å. In the fifth Bi+2.33+ site, Bi+2.33+ is bonded to six Te2- atoms to form BiTe6 octahedra that share corners with three equivalent InTe6 octahedra, an edgeedge with one InTe6 octahedra, and edges with eight BiTe6 octahedra. The corner-sharing octahedral tilt angles are 2°. There are a spread of Bi–Te bond distances ranging from 3.11–3.31 Å. There are six inequivalent Te2- sites. In the first Te2- site, Te2- is bonded to one In1+ and five Bi+2.33+ atoms to form TeInBi5 octahedra that share corners with three equivalent TeBi6 octahedra and edges with nine TeInBi5 octahedra. The corner-sharing octahedra tilt angles range from 3–4°. In the second Te2- site, Te2- is bonded to two equivalent In1+ and four Bi+2.33+ atoms to form TeIn2Bi4 octahedra that share corners with three equivalent TeBi6 octahedra and edges with nine TeInBi5 octahedra. The corner-sharing octahedra tilt angles range from 4–5°. In the third Te2- site, Te2- is bonded in a 3-coordinate geometry to two equivalent In1+ and one Bi+2.33+ atom. In the fourth Te2- site, Te2- is bonded in a 3-coordinate geometry to one In1+ and two equivalent Bi+2.33+ atoms. In the fifth Te2- site, Te2- is bonded to six Bi+2.33+ atoms to form a mixture of corner and edge-sharing TeBi6 octahedra. The corner-sharing octahedra tilt angles range from 3–4°. In the sixth Te2- site, Te2- is bonded to six Bi+2.33+ atoms to form TeBi6 octahedra that share corners with three equivalent TeIn2Bi4 octahedra and edges with nine TeInBi5 octahedra. The corner-sharing octahedra tilt angles range from 4–5°.