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Title: Materials Data on SnHg7(As2I3)2 by Materials Project

Abstract

Hg7Sn(As2I3)2 crystallizes in the cubic P2_13 space group. The structure is three-dimensional. there are three inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded to two As3- and three I1- atoms to form distorted HgAs2I3 square pyramids that share corners with three equivalent HgAs2I4 octahedra, corners with two equivalent HgAs2I3 square pyramids, a cornercorner with one AsHg3As tetrahedra, an edgeedge with one HgAs2I4 octahedra, and edges with two equivalent HgAs2I3 square pyramids. The corner-sharing octahedra tilt angles range from 43–55°. There are one shorter (2.60 Å) and one longer (2.62 Å) Hg–As bond lengths. There are a spread of Hg–I bond distances ranging from 3.17–3.52 Å. In the second Hg2+ site, Hg2+ is bonded to two As3- and four I1- atoms to form distorted HgAs2I4 octahedra that share corners with two equivalent HgAs2I4 octahedra, corners with three equivalent HgAs2I3 square pyramids, a cornercorner with one AsHg3As tetrahedra, edges with four equivalent HgAs2I4 octahedra, and an edgeedge with one HgAs2I3 square pyramid. The corner-sharing octahedral tilt angles are 30°. There are one shorter (2.59 Å) and one longer (2.60 Å) Hg–As bond lengths. There are a spread of Hg–I bond distances ranging from 3.34–3.72 Å. In the third Hg2+more » site, Hg2+ is bonded in a linear geometry to two As3- atoms. There are one shorter (2.54 Å) and one longer (2.55 Å) Hg–As bond lengths. Sn4+ is bonded in a 3-coordinate geometry to three equivalent I1- atoms. All Sn–I bond lengths are 2.98 Å. There are four inequivalent As3- sites. In the first As3- site, As3- is bonded to three equivalent Hg2+ and one As3- atom to form AsHg3As tetrahedra that share corners with three equivalent HgAs2I4 octahedra and corners with three equivalent AsHg4 tetrahedra. The corner-sharing octahedral tilt angles are 71°. The As–As bond length is 2.46 Å. In the second As3- site, As3- is bonded to four Hg2+ atoms to form corner-sharing AsHg4 tetrahedra. In the third As3- site, As3- is bonded to three equivalent Hg2+ and one As3- atom to form AsHg3As tetrahedra that share corners with three equivalent HgAs2I3 square pyramids and corners with three equivalent AsHg4 tetrahedra. In the fourth As3- site, As3- is bonded to four Hg2+ atoms to form corner-sharing AsHg4 tetrahedra. There are two inequivalent I1- sites. In the first I1- site, I1- is bonded in a 4-coordinate geometry to four Hg2+ atoms. In the second I1- site, I1- is bonded in a 1-coordinate geometry to three Hg2+ and one Sn4+ atom.« less

Authors:
Contributors:
Researcher:
Publication Date:
Other Number(s):
mp-571478
DOE Contract Number:  
AC02-05CH11231; EDCBEE
Product Type:
Dataset
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). LBNL Materials Project
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Subject:
36 MATERIALS SCIENCE
Keywords:
crystal structure; SnHg7(As2I3)2; As-Hg-I-Sn
OSTI Identifier:
1276281
DOI:
10.17188/1276281

Citation Formats

Persson, Kristin, and Project, Materials. Materials Data on SnHg7(As2I3)2 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1276281.
Persson, Kristin, & Project, Materials. Materials Data on SnHg7(As2I3)2 by Materials Project. United States. doi:10.17188/1276281.
Persson, Kristin, and Project, Materials. 2020. "Materials Data on SnHg7(As2I3)2 by Materials Project". United States. doi:10.17188/1276281. https://www.osti.gov/servlets/purl/1276281. Pub date:Sat May 30 00:00:00 EDT 2020
@article{osti_1276281,
title = {Materials Data on SnHg7(As2I3)2 by Materials Project},
author = {Persson, Kristin and Project, Materials},
abstractNote = {Hg7Sn(As2I3)2 crystallizes in the cubic P2_13 space group. The structure is three-dimensional. there are three inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded to two As3- and three I1- atoms to form distorted HgAs2I3 square pyramids that share corners with three equivalent HgAs2I4 octahedra, corners with two equivalent HgAs2I3 square pyramids, a cornercorner with one AsHg3As tetrahedra, an edgeedge with one HgAs2I4 octahedra, and edges with two equivalent HgAs2I3 square pyramids. The corner-sharing octahedra tilt angles range from 43–55°. There are one shorter (2.60 Å) and one longer (2.62 Å) Hg–As bond lengths. There are a spread of Hg–I bond distances ranging from 3.17–3.52 Å. In the second Hg2+ site, Hg2+ is bonded to two As3- and four I1- atoms to form distorted HgAs2I4 octahedra that share corners with two equivalent HgAs2I4 octahedra, corners with three equivalent HgAs2I3 square pyramids, a cornercorner with one AsHg3As tetrahedra, edges with four equivalent HgAs2I4 octahedra, and an edgeedge with one HgAs2I3 square pyramid. The corner-sharing octahedral tilt angles are 30°. There are one shorter (2.59 Å) and one longer (2.60 Å) Hg–As bond lengths. There are a spread of Hg–I bond distances ranging from 3.34–3.72 Å. In the third Hg2+ site, Hg2+ is bonded in a linear geometry to two As3- atoms. There are one shorter (2.54 Å) and one longer (2.55 Å) Hg–As bond lengths. Sn4+ is bonded in a 3-coordinate geometry to three equivalent I1- atoms. All Sn–I bond lengths are 2.98 Å. There are four inequivalent As3- sites. In the first As3- site, As3- is bonded to three equivalent Hg2+ and one As3- atom to form AsHg3As tetrahedra that share corners with three equivalent HgAs2I4 octahedra and corners with three equivalent AsHg4 tetrahedra. The corner-sharing octahedral tilt angles are 71°. The As–As bond length is 2.46 Å. In the second As3- site, As3- is bonded to four Hg2+ atoms to form corner-sharing AsHg4 tetrahedra. In the third As3- site, As3- is bonded to three equivalent Hg2+ and one As3- atom to form AsHg3As tetrahedra that share corners with three equivalent HgAs2I3 square pyramids and corners with three equivalent AsHg4 tetrahedra. In the fourth As3- site, As3- is bonded to four Hg2+ atoms to form corner-sharing AsHg4 tetrahedra. There are two inequivalent I1- sites. In the first I1- site, I1- is bonded in a 4-coordinate geometry to four Hg2+ atoms. In the second I1- site, I1- is bonded in a 1-coordinate geometry to three Hg2+ and one Sn4+ atom.},
doi = {10.17188/1276281},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {5}
}

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