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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Ga(MoS2)4 by Materials Project

GaMo4S8 crystallizes in the trigonal R3m space group. The structure is three-dimensional. there are two inequivalent Mo+3.25+ sites. In the first Mo+3.25+ site, Mo+3.25+ is bonded to six S2- atoms to form distorted MoS6 octahedra that share corners with three equivalent GaS4 tetrahedra, edges with four equivalent MoS6 octahedra, and edges with two equivalent MoS6 pentagonal pyramids. There are a spread of Mo–S bond distances ranging from 2.35–2.62 Å. In the second Mo+3.25+ site, Mo+3.25+ is bonded to six S2- atoms to form distorted MoS6 pentagonal pyramids that share corners with three equivalent GaS4 tetrahedra and edges with six equivalent MoS6 octahedra. There are three shorter (2.37 Å) and three longer (2.64 Å) Mo–S bond lengths. Ga3+ is bonded to four S2- atoms to form GaS4 tetrahedra that share corners with nine equivalent MoS6 octahedra and corners with three equivalent MoS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 65°. There are one shorter (2.31 Å) and three longer (2.32 Å) Ga–S bond lengths. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded to three Mo+3.25+ and one Ga3+ atom to form a mixture of distorted edge and corner-sharing SGaMo3 tetrahedra. In the second S2- site, S2- is bonded to three equivalent Mo+3.25+ and one Ga3+ atom to form a mixture of distorted edge and corner-sharing SGaMo3 tetrahedra. In the third S2- site, S2- is bonded in a 3-coordinate geometry to three Mo+3.25+ atoms. In the fourth S2- site, S2- is bonded in a 3-coordinate geometry to three equivalent Mo+3.25+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ga(MoS2)4 by Materials Project

GaMo4S8 crystallizes in the trigonal R3m space group. The structure is three-dimensional. there are two inequivalent Mo+3.25+ sites. In the first Mo+3.25+ site, Mo+3.25+ is bonded to six S2- atoms to form distorted MoS6 octahedra that share corners with three equivalent GaS4 tetrahedra, edges with four equivalent MoS6 octahedra, and edges with two equivalent MoS6 pentagonal pyramids. There are a spread of Mo–S bond distances ranging from 2.35–2.62 Å. In the second Mo+3.25+ site, Mo+3.25+ is bonded to six S2- atoms to form distorted MoS6 pentagonal pyramids that share corners with three equivalent GaS4 tetrahedra and edges with six equivalent MoS6 octahedra. There are three shorter (2.37 Å) and three longer (2.63 Å) Mo–S bond lengths. Ga3+ is bonded to four S2- atoms to form GaS4 tetrahedra that share corners with nine equivalent MoS6 octahedra and corners with three equivalent MoS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 65°. All Ga–S bond lengths are 2.31 Å. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded in a 3-coordinate geometry to three equivalent Mo+3.25+ atoms. In the second S2- site, S2- is bonded to three Mo+3.25+ and one Ga3+ atom to form a mixture of distorted edge and corner-sharing SGaMo3 tetrahedra. In the third S2- site, S2- is bonded to three equivalent Mo+3.25+ and one Ga3+ atom to form a mixture of distorted edge and corner-sharing SGaMo3 tetrahedra. In the fourth S2- site, S2- is bonded in a 3-coordinate geometry to three Mo+3.25+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ga40Mo8S by Materials Project

Mo8Ga40S crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are four inequivalent Mo sites. In the first Mo site, Mo is bonded in a 10-coordinate geometry to ten Ga atoms. There are a spread of Mo–Ga bond distances ranging from 2.59–2.83 Å. In the second Mo site, Mo is bonded in a 10-coordinate geometry to ten Ga atoms. There are a spread of Mo–Ga bond distances ranging from 2.59–2.81 Å. In the third Mo site, Mo is bonded in a 10-coordinate geometry to ten Ga atoms. There are a spread of Mo–Ga bond distances ranging from 2.59–2.82 Å. In the fourth Mo site, Mo is bonded in a 10-coordinate geometry to ten Ga atoms. There are a spread of Mo–Ga bond distances ranging from 2.59–2.81 Å. There are fifteen inequivalent Ga sites. In the first Ga site, Ga is bonded in a distorted bent 150 degrees geometry to two Mo atoms. In the second Ga site, Ga is bonded in a 1-coordinate geometry to two Mo, two equivalent Ga, and one S atom. Both Ga–Ga bond lengths are 2.82 Å. The Ga–S bond length is 2.35 Å. In the third Ga site, Ga is bonded in a distorted bent 150 degrees geometry to two Mo atoms. In the fourth Ga site, Ga is bonded in a 3-coordinate geometry to two Mo, two equivalent Ga, and one S atom. Both Ga–Ga bond lengths are 3.03 Å. The Ga–S bond length is 2.36 Å. In the fifth Ga site, Ga is bonded in a 2-coordinate geometry to two equivalent Mo and four Ga atoms. All Ga–Ga bond lengths are 2.92 Å. In the sixth Ga site, Ga is bonded in a 2-coordinate geometry to two equivalent Mo and four Ga atoms. All Ga–Ga bond lengths are 2.92 Å. In the seventh Ga site, Ga is bonded in a distorted bent 150 degrees geometry to two equivalent Mo and two equivalent Ga atoms. Both Ga–Ga bond lengths are 2.93 Å. In the eighth Ga site, Ga is bonded in a 2-coordinate geometry to two equivalent Mo and four Ga atoms. There are two shorter (2.91 Å) and two longer (2.92 Å) Ga–Ga bond lengths. In the ninth Ga site, Ga is bonded in a distorted linear geometry to two equivalent Mo and eight Ga atoms. There are two shorter (2.67 Å) and two longer (2.87 Å) Ga–Ga bond lengths. In the tenth Ga site, Ga is bonded in a distorted linear geometry to two equivalent Mo and four Ga atoms. Both Ga–Ga bond lengths are 2.83 Å. In the eleventh Ga site, Ga is bonded in a 2-coordinate geometry to two Mo and three Ga atoms. There are one shorter (2.82 Å) and one longer (2.87 Å) Ga–Ga bond lengths. In the twelfth Ga site, Ga is bonded in a 2-coordinate geometry to two Mo and six Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.66–2.79 Å. In the thirteenth Ga site, Ga is bonded in a 2-coordinate geometry to two Mo and seven Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.64–2.78 Å. In the fourteenth Ga site, Ga is bonded in a 2-coordinate geometry to two Mo and four Ga atoms. In the fifteenth Ga site, Ga is bonded in a 2-coordinate geometry to two Mo and six Ga atoms. There are one shorter (2.66 Å) and one longer (2.68 Å) Ga–Ga bond lengths. S is bonded in a square co-planar geometry to four Ga atoms.

36 MATERIALS SCIENCE↗