DOI: 10.17188/1677741
title: Materials Data on Ta12Ga3(TeSe2)8 by Materials Project

description: Ta12Ga3(TeSe2)8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twelve inequivalent Ta+3.25+ sites. In the first Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to three Te2- and three Se2- atoms. There are a spread of Ta–Te bond distances ranging from 2.95–2.98 Å. There are one shorter (2.56 Å) and two longer (2.58 Å) Ta–Se bond lengths. In the second Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to two Te2- and four Se2- atoms. There are one shorter (2.93 Å) and one longer (2.97 Å) Ta–Te bond lengths. There are three shorter (2.57 Å) and one longer (2.87 Å) Ta–Se bond lengths. In the third Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to three Te2- and three Se2- atoms. There are two shorter (2.95 Å) and one longer (2.97 Å) Ta–Te bond lengths. There are two shorter (2.57 Å) and one longer (2.58 Å) Ta–Se bond lengths. In the fourth Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to two Te2- and four Se2- atoms. There are one shorter (2.95 Å) and one longer (2.99 Å) Ta–Te bond lengths. There are a spread of Ta–Se bond distances ranging from 2.56–2.89 Å. In the fifth Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to two Te2- and four Se2- atoms. There are one shorter (2.96 Å) and one longer (2.98 Å) Ta–Te bond lengths. There are three shorter (2.57 Å) and one longer (2.87 Å) Ta–Se bond lengths. In the sixth Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to two Te2- and four Se2- atoms. There are one shorter (2.96 Å) and one longer (2.99 Å) Ta–Te bond lengths. There are a spread of Ta–Se bond distances ranging from 2.56–2.89 Å. In the seventh Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to one Te2- and five Se2- atoms. The Ta–Te bond length is 2.99 Å. There are a spread of Ta–Se bond distances ranging from 2.55–2.87 Å. In the eighth Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to two Te2- and four Se2- atoms. There are one shorter (2.96 Å) and one longer (3.00 Å) Ta–Te bond lengths. There are three shorter (2.56 Å) and one longer (2.90 Å) Ta–Se bond lengths. In the ninth Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to two Te2- and four Se2- atoms. There are one shorter (2.95 Å) and one longer (3.00 Å) Ta–Te bond lengths. There are a spread of Ta–Se bond distances ranging from 2.55–2.88 Å. In the tenth Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to two Te2- and four Se2- atoms. There are one shorter (2.94 Å) and one longer (2.97 Å) Ta–Te bond lengths. There are a spread of Ta–Se bond distances ranging from 2.54–2.84 Å. In the eleventh Ta+3.25+ site, Ta+3.25+ is bonded to one Te2- and five Se2- atoms to form distorted TaTeSe5 octahedra that share corners with three GaTe2Se2 tetrahedra. The Ta–Te bond length is 2.94 Å. There are a spread of Ta–Se bond distances ranging from 2.54–2.85 Å. In the twelfth Ta+3.25+ site, Ta+3.25+ is bonded in a 6-coordinate geometry to two Te2- and four Se2- atoms. There are one shorter (2.94 Å) and one longer (2.95 Å) Ta–Te bond lengths. There are a spread of Ta–Se bond distances ranging from 2.54–2.83 Å. There are three inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded in a tetrahedral geometry to three Te2- and one Se2- atom. All Ga–Te bond lengths are 2.62 Å. The Ga–Se bond length is 2.46 Å. In the second Ga3+ site, Ga3+ is bonded to two Te2- and two Se2- atoms to form GaTe2Se2 tetrahedra that share corners with two equivalent TaTeSe5 octahedra. The corner-sharing octahedral tilt angles are 66°. There are one shorter (2.64 Å) and one longer (2.65 Å) Ga–Te bond lengths. There are one shorter (2.49 Å) and one longer (2.50 Å) Ga–Se bond lengths. In the third Ga3+ site, Ga3+ is bonded to three Te2- and one Se2- atom to form GaTe3Se tetrahedra that share a cornercorner with one TaTeSe5 octahedra. The corner-sharing octahedral tilt angles are 64°. All Ga–Te bond lengths are 2.62 Å. The Ga–Se bond length is 2.46 Å. There are eight inequivalent Te2- sites. In the first Te2- site, Te2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted TeTa3Ga tetrahedra that share a cornercorner with one SeTa3Ga tetrahedra, corners with two TeTa3Ga tetrahedra, an edgeedge with one SeTa3Ga tetrahedra, and edges with two TeTa3Ga tetrahedra. In the second Te2- site, Te2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted TeTa3Ga tetrahedra that share a cornercorner with one SeTa3Ga tetrahedra, corners with two TeTa3Ga tetrahedra, an edgeedge with one SeTa3Ga tetrahedra, and edges with two TeTa3Ga tetrahedra. In the third Te2- site, Te2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted TeTa3Ga tetrahedra that share a cornercorner with one SeTa3Ga tetrahedra, corners with two TeTa3Ga tetrahedra, an edgeedge with one TeTa3Ga tetrahedra, and edges with two SeTa3Ga tetrahedra. In the fourth Te2- site, Te2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted TeTa3Ga tetrahedra that share a cornercorner with one SeTa3Ga tetrahedra, corners with two TeTa3Ga tetrahedra, an edgeedge with one SeTa3Ga tetrahedra, and edges with two TeTa3Ga tetrahedra. In the fifth Te2- site, Te2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted TeTa3Ga tetrahedra that share a cornercorner with one TeTa3Ga tetrahedra, corners with two SeTa3Ga tetrahedra, an edgeedge with one SeTa3Ga tetrahedra, and edges with two TeTa3Ga tetrahedra. In the sixth Te2- site, Te2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted TeTa3Ga tetrahedra that share a cornercorner with one TeTa3Ga tetrahedra, corners with two SeTa3Ga tetrahedra, an edgeedge with one TeTa3Ga tetrahedra, and edges with two SeTa3Ga tetrahedra. In the seventh Te2- site, Te2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted TeTa3Ga tetrahedra that share a cornercorner with one SeTa3Ga tetrahedra, corners with two TeTa3Ga tetrahedra, an edgeedge with one SeTa3Ga tetrahedra, and edges with two TeTa3Ga tetrahedra. In the eighth Te2- site, Te2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted TeTa3Ga tetrahedra that share a cornercorner with one SeTa3Ga tetrahedra, corners with two TeTa3Ga tetrahedra, an edgeedge with one SeTa3Ga tetrahedra, and edges with two TeTa3Ga tetrahedra. There are sixteen inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the second Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the third Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the fourth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the fifth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the sixth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the seventh Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the eighth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the ninth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the tenth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the eleventh Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the twelfth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta+3.25+ atoms. In the thirteenth Se2- site, Se2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted SeTa3Ga tetrahedra that share a cornercorner with one SeTa3Ga tetrahedra, corners with two TeTa3Ga tetrahedra, an edgeedge with one SeTa3Ga tetrahedra, and edges with two TeTa3Ga tetrahedra. In the fourteenth Se2- site, Se2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted SeTa3Ga tetrahedra that share corners with three TeTa3Ga tetrahedra and edges with three TeTa3Ga tetrahedra. In the fifteenth Se2- site, Se2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted SeTa3Ga tetrahedra that share corners with three TeTa3Ga tetrahedra and edges with three TeTa3Ga tetrahedra. In the sixteenth Se2- site, Se2- is bonded to three Ta+3.25+ and one Ga3+ atom to form distorted SeTa3Ga tetrahedra that share a cornercorner with one SeTa3Ga tetrahedra, corners with two TeTa3Ga tetrahedra, an edgeedge with one SeTa3Ga tetrahedra, and edges with two TeTa3Ga tetrahedra.