DOI: 10.17188/1286517
title: Materials Data on MgH18C4SN8O9 by Materials Project

description: MgC4N8H18SO9 is beta Np structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four MgC4N8H18SO9 clusters. Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share a cornercorner with one SO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.08–2.16 Å. There are four inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to two N2- and one O2- atom. There is one shorter (1.34 Å) and one longer (1.37 Å) C–N bond length. The C–O bond length is 1.27 Å. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to two N2- and one O2- atom. Both C–N bond lengths are 1.35 Å. The C–O bond length is 1.28 Å. In the third C4+ site, C4+ is bonded in a trigonal planar geometry to two N2- and one O2- atom. Both C–N bond lengths are 1.35 Å. The C–O bond length is 1.28 Å. In the fourth C4+ site, C4+ is bonded in a trigonal planar geometry to two N2- and one O2- atom. There is one shorter (1.35 Å) and one longer (1.36 Å) C–N bond length. The C–O bond length is 1.27 Å. There are eight inequivalent N2- sites. In the first N2- site, N2- is bonded in a distorted trigonal non-coplanar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the second N2- site, N2- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the third N2- site, N2- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the fourth N2- site, N2- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. There is one shorter (1.01 Å) and one longer (1.02 Å) N–H bond length. In the fifth N2- site, N2- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the sixth N2- site, N2- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the seventh N2- site, N2- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the eighth N2- site, N2- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. There is one shorter (1.01 Å) and one longer (1.02 Å) N–H bond length. There are eighteen inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the eleventh H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the twelfth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the thirteenth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the fourteenth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the fifteenth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the sixteenth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the seventeenth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the eighteenth H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. S2- is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one MgO6 octahedra. The corner-sharing octahedral tilt angles are 42°. There are a spread of S–O bond distances ranging from 1.48–1.50 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one S2- atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Mg2+ and one S2- atom. In the third O2- site, O2- is bonded in a single-bond geometry to one S2- atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one S2- atom. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to one Mg2+ and two H1+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Mg2+ and one C4+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Mg2+ and one C4+ atom. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to one Mg2+ and one C4+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Mg2+ and one C4+ atom.