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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Sr(H2N)2 by Materials Project

Sr(NH2)2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four strontium;azanide molecules. Sr2+ is bonded in a 2-coordinate geometry to two N3- atoms. There are one shorter (2.62 Å) and one longer (2.63 Å) Sr–N bond lengths. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted water-like geometry to one Sr2+ and two H1+ atoms. Both N–H bond lengths are 1.03 Å. In the second N3- site, N3- is bonded in a distorted water-like geometry to one Sr2+ and two H1+ atoms. Both N–H bond lengths are 1.03 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr2HN by Materials Project

Sr2NH is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Sr2+ is bonded to three equivalent N3- and three equivalent H1- atoms to form a mixture of corner and edge-sharing SrH3N3 octahedra. The corner-sharing octahedral tilt angles are 0°. All Sr–N bond lengths are 2.60 Å. All Sr–H bond lengths are 2.85 Å. N3- is bonded to six equivalent Sr2+ atoms to form NSr6 octahedra that share corners with six equivalent HSr6 octahedra, edges with six equivalent NSr6 octahedra, and edges with six equivalent HSr6 octahedra. The corner-sharing octahedral tilt angles are 7°. H1- is bonded to six equivalent Sr2+ atoms to form HSr6 octahedra that share corners with six equivalent NSr6 octahedra, edges with six equivalent NSr6 octahedra, and edges with six equivalent HSr6 octahedra. The corner-sharing octahedral tilt angles are 7°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr(H2N)2 by Materials Project

Sr(NH2)2 crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Sr2+ is bonded in a 6-coordinate geometry to six equivalent N3- atoms. There are two shorter (2.65 Å) and four longer (2.76 Å) Sr–N bond lengths. N3- is bonded in a distorted water-like geometry to three equivalent Sr2+ and two equivalent H1+ atoms. Both N–H bond lengths are 1.03 Å. H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrHN by Materials Project

SrNH crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to five equivalent N3- and three equivalent H1+ atoms. There are a spread of Sr–N bond distances ranging from 2.54–2.83 Å. There are one shorter (2.60 Å) and two longer (2.67 Å) Sr–H bond lengths. N3- is bonded in a distorted single-bond geometry to five equivalent Sr2+ and one H1+ atom. The N–H bond length is 1.04 Å. H1+ is bonded in a single-bond geometry to three equivalent Sr2+ and one N3- atom.

36 MATERIALS SCIENCE↗