Materials Data on CsGaTe2 by Materials Project
CsGaTe2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight Te2- atoms. There are a spread of Cs–Te bond distances ranging from 3.90–4.31 Å. In the second Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight Te2- atoms. There are a spread of Cs–Te bond distances ranging from 3.97–4.32 Å. There are two inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded to four Te2- atoms to form corner-sharing GaTe4 tetrahedra. There are a spread of Ga–Te bond distances ranging from 2.65–2.70 Å. In the second Ga3+ site, Ga3+ is bonded to four Te2- atoms to form corner-sharing GaTe4 tetrahedra. There are a spread of Ga–Te bond distances ranging from 2.65–2.70 Å. There are five inequivalent Te2- sites. In the first Te2- site, Te2- is bonded in a 2-coordinate geometry to four Cs1+ and two Ga3+ atoms. In the second Te2- site, Te2- is bonded in a 2-coordinate geometry to four Cs1+ and two equivalent Ga3+ atoms. In the third Te2- site, Te2- is bonded in a 2-coordinate geometry to four Cs1+ and two equivalent Ga3+ atoms. In the fourth Te2- site, Te2- is bonded in a 6-coordinate geometry to four Cs1+ and two Ga3+ atoms. In the fifth Te2- site, Te2- is bonded to four Cs1+ and two Ga3+ atoms to form a mixture of distorted corner and edge-sharing TeCs4Ga2 octahedra. The corner-sharing octahedral tilt angles are 8°.