DOE OSTI2020
Ag3Cd2In3Te8 is Stannite-like structured and crystallizes in the tetragonal P-4 space group. The structure is three-dimensional. there are two inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded to four Te2- atoms to form AgTe4 tetrahedra that share corners with two equivalent AgTe4 tetrahedra, corners with four CdTe4 tetrahedra, and corners with six InTe4 tetrahedra. There are two shorter (2.82 Å) and two longer (2.83 Å) Ag–Te bond lengths. In the second Ag1+ site, Ag1+ is bonded to four equivalent Te2- atoms to form AgTe4 tetrahedra that share corners with four equivalent AgTe4 tetrahedra and corners with eight InTe4 tetrahedra. All Ag–Te bond lengths are 2.82 Å. There are two inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded to four equivalent Te2- atoms to form CdTe4 tetrahedra that share corners with four equivalent AgTe4 tetrahedra, corners with four equivalent CdTe4 tetrahedra, and corners with four equivalent InTe4 tetrahedra. All Cd–Te bond lengths are 2.87 Å. In the second Cd2+ site, Cd2+ is bonded to four equivalent Te2- atoms to form CdTe4 tetrahedra that share corners with four equivalent AgTe4 tetrahedra, corners with four equivalent CdTe4 tetrahedra, and corners with four equivalent InTe4 tetrahedra. All Cd–Te bond lengths are 2.85 Å. There are two inequivalent In3+ sites. In the first In3+ site, In3+ is bonded to four Te2- atoms to form InTe4 tetrahedra that share corners with two equivalent InTe4 tetrahedra, corners with four CdTe4 tetrahedra, and corners with six AgTe4 tetrahedra. There are two shorter (2.85 Å) and two longer (2.86 Å) In–Te bond lengths. In the second In3+ site, In3+ is bonded to four equivalent Te2- atoms to form InTe4 tetrahedra that share corners with four equivalent InTe4 tetrahedra and corners with eight AgTe4 tetrahedra. All In–Te bond lengths are 2.87 Å. There are two inequivalent Te2- sites. In the first Te2- site, Te2- is bonded to one Ag1+, two Cd2+, and one In3+ atom to form corner-sharing TeCd2InAg tetrahedra. In the second Te2- site, Te2- is bonded to two Ag1+ and two In3+ atoms to form corner-sharing TeIn2Ag2 tetrahedra.