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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on SnHg2(SBr)2 by Materials Project

Hg2Sn(SBr)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded in a distorted T-shaped geometry to two S2- and one Br1- atom. There are one shorter (2.36 Å) and one longer (2.38 Å) Hg–S bond lengths. The Hg–Br bond length is 3.38 Å. In the second Hg2+ site, Hg2+ is bonded in a distorted rectangular see-saw-like geometry to three S2- and one Br1- atom. There are a spread of Hg–S bond distances ranging from 2.38–3.25 Å. The Hg–Br bond length is 3.43 Å. Sn2+ is bonded to one S2- and three Br1- atoms to form distorted edge-sharing SnSBr3 trigonal pyramids. The Sn–S bond length is 2.91 Å. There are a spread of Sn–Br bond distances ranging from 2.68–3.03 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a 3-coordinate geometry to two Hg2+ and one Sn2+ atom. In the second S2- site, S2- is bonded in a 3-coordinate geometry to three Hg2+ atoms. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 1-coordinate geometry to two Hg2+ and one Sn2+ atom. In the second Br1- site, Br1- is bonded in a distorted L-shaped geometry to two equivalent Sn2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SnHg2(SBr)2 by Materials Project

Hg2Sn(SBr)2 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one Hg2Sn(SBr)2 sheet oriented in the (1, 0, 2) direction. there are two inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded in a distorted linear geometry to two S2- atoms. There are one shorter (2.36 Å) and one longer (2.38 Å) Hg–S bond lengths. In the second Hg2+ site, Hg2+ is bonded in a distorted linear geometry to two S2- atoms. There are one shorter (2.36 Å) and one longer (2.38 Å) Hg–S bond lengths. Sn2+ is bonded in a distorted rectangular see-saw-like geometry to one S2- and three Br1- atoms. The Sn–S bond length is 2.91 Å. There are a spread of Sn–Br bond distances ranging from 2.67–3.11 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted water-like geometry to two Hg2+ atoms. In the second S2- site, S2- is bonded in a 3-coordinate geometry to two Hg2+ and one Sn2+ atom. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a single-bond geometry to one Sn2+ atom. In the second Br1- site, Br1- is bonded in a distorted L-shaped geometry to two equivalent Sn2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SnHg2(SBr)2 by Materials Project

Hg2Sn(SBr)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded in a 2-coordinate geometry to two S2- and three Br1- atoms. Both Hg–S bond lengths are 2.40 Å. There are two shorter (3.38 Å) and one longer (3.43 Å) Hg–Br bond lengths. In the second Hg2+ site, Hg2+ is bonded in a 2-coordinate geometry to three S2- and two equivalent Br1- atoms. There are a spread of Hg–S bond distances ranging from 2.40–3.08 Å. There are one shorter (3.46 Å) and one longer (3.56 Å) Hg–Br bond lengths. Sn2+ is bonded to two S2- and three Br1- atoms to form distorted edge-sharing SnS2Br3 square pyramids. There are one shorter (3.01 Å) and one longer (3.08 Å) Sn–S bond lengths. There are a spread of Sn–Br bond distances ranging from 2.84–2.96 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a 3-coordinate geometry to two Hg2+ and one Sn2+ atom. In the second S2- site, S2- is bonded in a 4-coordinate geometry to three Hg2+ and one Sn2+ atom. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 1-coordinate geometry to four Hg2+ and one Sn2+ atom. In the second Br1- site, Br1- is bonded in a 3-coordinate geometry to one Hg2+ and two equivalent Sn2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SnHg2(SBr)2 by Materials Project

Hg2Sn(SBr)2 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one Hg2Sn(SBr)2 sheet oriented in the (1, 0, 0) direction. there are two inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded in a T-shaped geometry to two S2- and one Br1- atom. There are one shorter (2.37 Å) and one longer (2.40 Å) Hg–S bond lengths. The Hg–Br bond length is 3.24 Å. In the second Hg2+ site, Hg2+ is bonded in a 3-coordinate geometry to two equivalent S2- and one Br1- atom. There are one shorter (3.53 Å) and one longer (3.59 Å) Hg–S bond lengths. The Hg–Br bond length is 3.69 Å. Sn2+ is bonded in a tetrahedral geometry to two S2- and two Br1- atoms. There are one shorter (2.39 Å) and one longer (2.43 Å) Sn–S bond lengths. There are one shorter (2.52 Å) and one longer (2.54 Å) Sn–Br bond lengths. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a bent 120 degrees geometry to one Hg2+ and one Sn2+ atom. In the second S2- site, S2- is bonded in a distorted L-shaped geometry to three Hg2+ and one Sn2+ atom. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a single-bond geometry to one Hg2+ and one Sn2+ atom. In the second Br1- site, Br1- is bonded in a 1-coordinate geometry to one Hg2+ and one Sn2+ atom.

36 MATERIALS SCIENCE↗