Materials Data on Ta12Co3Pt3Se32 by Materials Project
Ta12Co3Pt3Se32 crystallizes in the monoclinic Cm space group. The structure is two-dimensional and consists of two Ta12Co3Pt3Se32 sheets oriented in the (1, 0, 0) direction. there are twelve inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded in a 6-coordinate geometry to two equivalent Pt+0.67- and six Se2- atoms. Both Ta–Pt bond lengths are 3.05 Å. There are a spread of Ta–Se bond distances ranging from 2.56–2.80 Å. In the second Ta5+ site, Ta5+ is bonded to six Se2- atoms to form distorted TaSe6 pentagonal pyramids that share a cornercorner with one TaSe6 octahedra, edges with two equivalent TaSe6 pentagonal pyramids, and edges with two equivalent CoSe5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 50°. There are a spread of Ta–Se bond distances ranging from 2.54–2.64 Å. In the third Ta5+ site, Ta5+ is bonded to six Se2- atoms to form distorted TaSe6 pentagonal pyramids that share a cornercorner with one TaSe6 octahedra, edges with two equivalent TaSe6 pentagonal pyramids, and edges with two equivalent CoSe5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 51°. There are a spread of Ta–Se bond distances ranging from 2.53–2.65 Å. In the fourth Ta5+ site, Ta5+ is bonded to six Se2- atoms to form distorted TaSe6 pentagonal pyramids that share a cornercorner with one TaSe6 octahedra, edges with two equivalent TaSe6 pentagonal pyramids, and edges with two equivalent CoSe5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 50°. There are a spread of Ta–Se bond distances ranging from 2.54–2.65 Å. In the fifth Ta5+ site, Ta5+ is bonded in a 6-coordinate geometry to six Se2- atoms. There are five shorter (2.62 Å) and one longer (2.64 Å) Ta–Se bond lengths. In the sixth Ta5+ site, Ta5+ is bonded in a 6-coordinate geometry to six Se2- atoms. There are a spread of Ta–Se bond distances ranging from 2.61–2.63 Å. In the seventh Ta5+ site, Ta5+ is bonded in a 6-coordinate geometry to six Se2- atoms. There are a spread of Ta–Se bond distances ranging from 2.60–2.62 Å. In the eighth Ta5+ site, Ta5+ is bonded in a 6-coordinate geometry to six Se2- atoms. There are five shorter (2.62 Å) and one longer (2.64 Å) Ta–Se bond lengths. In the ninth Ta5+ site, Ta5+ is bonded in a 6-coordinate geometry to two equivalent Pt+0.67- and six Se2- atoms. Both Ta–Pt bond lengths are 2.99 Å. There are a spread of Ta–Se bond distances ranging from 2.58–2.68 Å. In the tenth Ta5+ site, Ta5+ is bonded to six Se2- atoms to form TaSe6 octahedra that share a cornercorner with one TaSe6 pentagonal pyramid, edges with four TaSe6 octahedra, and edges with two equivalent CoSe5 trigonal bipyramids. There are a spread of Ta–Se bond distances ranging from 2.53–2.70 Å. In the eleventh Ta5+ site, Ta5+ is bonded to six Se2- atoms to form TaSe6 octahedra that share a cornercorner with one TaSe6 pentagonal pyramid, edges with two equivalent TaSe6 octahedra, and edges with two equivalent CoSe5 trigonal bipyramids. There are a spread of Ta–Se bond distances ranging from 2.53–2.71 Å. In the twelfth Ta5+ site, Ta5+ is bonded to six Se2- atoms to form TaSe6 octahedra that share a cornercorner with one TaSe6 pentagonal pyramid, edges with four TaSe6 octahedra, and edges with two equivalent CoSe5 trigonal bipyramids. There are a spread of Ta–Se bond distances ranging from 2.53–2.70 Å. There are three inequivalent Co2+ sites. In the first Co2+ site, Co2+ is bonded to five Se2- atoms to form CoSe5 trigonal bipyramids that share edges with two equivalent TaSe6 octahedra, edges with two equivalent TaSe6 pentagonal pyramids, and edges with two equivalent CoSe5 trigonal bipyramids. There are a spread of Co–Se bond distances ranging from 2.39–2.43 Å. In the second Co2+ site, Co2+ is bonded to five Se2- atoms to form CoSe5 trigonal bipyramids that share edges with two equivalent TaSe6 octahedra, edges with two equivalent TaSe6 pentagonal pyramids, and edges with two equivalent CoSe5 trigonal bipyramids. There are a spread of Co–Se bond distances ranging from 2.39–2.43 Å. In the third Co2+ site, Co2+ is bonded to five Se2- atoms to form CoSe5 trigonal bipyramids that share edges with two equivalent TaSe6 octahedra, edges with two equivalent TaSe6 pentagonal pyramids, and edges with two equivalent CoSe5 trigonal bipyramids. There are a spread of Co–Se bond distances ranging from 2.38–2.43 Å. There are three inequivalent Pt+0.67- sites. In the first Pt+0.67- site, Pt+0.67- is bonded in a square co-planar geometry to four Se2- atoms. All Pt–Se bond lengths are 2.48 Å. In the second Pt+0.67- site, Pt+0.67- is bonded in a square co-planar geometry to four Se2- atoms. There are two shorter (2.47 Å) and two longer (2.48 Å) Pt–Se bond lengths. In the third Pt+0.67- site, Pt+0.67- is bonded in a 9-coordinate geometry to four Ta5+ and five Se2- atoms. There are two shorter (2.50 Å) and three longer (2.57 Å) Pt–Se bond lengths. There are thirty-two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the second Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the third Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the fourth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the fifth Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Co2+ atom. In the sixth Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Co2+ atom. In the seventh Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Pt+0.67- atom. In the eighth Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Co2+ atom. In the ninth Se2- site, Se2- is bonded in a 4-coordinate geometry to two Ta5+ and two equivalent Pt+0.67- atoms. In the tenth Se2- site, Se2- is bonded in a 4-coordinate geometry to two Ta5+ and two equivalent Co2+ atoms. In the eleventh Se2- site, Se2- is bonded in a 4-coordinate geometry to two Ta5+ and two equivalent Co2+ atoms. In the twelfth Se2- site, Se2- is bonded in a 4-coordinate geometry to two Ta5+ and two equivalent Co2+ atoms. In the thirteenth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the fourteenth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the fifteenth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the sixteenth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the seventeenth Se2- site, Se2- is bonded in a distorted T-shaped geometry to one Ta5+ and two equivalent Co2+ atoms. In the eighteenth Se2- site, Se2- is bonded in a distorted T-shaped geometry to one Ta5+ and two equivalent Co2+ atoms. In the nineteenth Se2- site, Se2- is bonded in a 3-coordinate geometry to one Ta5+ and two equivalent Pt+0.67- atoms. In the twentieth Se2- site, Se2- is bonded in a distorted T-shaped geometry to one Ta5+ and two equivalent Co2+ atoms. In the twenty-first Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the twenty-second Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the twenty-third Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the twenty-fourth Se2- site, Se2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the twenty-fifth Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Pt+0.67- atom. In the twenty-sixth Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Pt+0.67- atom. In the twenty-seventh Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Pt+0.67- atom. In the twenty-eighth Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Pt+0.67- atom. In the twenty-ninth Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Pt+0.67- atom. In the thirtieth Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Pt+0.67- atom. In the thirty-first Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Pt+0.67- atom. In the thirty-second Se2- site, Se2- is bonded in a 3-coordinate geometry to two equivalent Ta5+ and one Pt+0.67- atom.