Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “SrMg5”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

5 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on SrMg5 by Materials Project

SrMg5 crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. Sr is bonded in a distorted hexagonal planar geometry to eighteen Mg atoms. There are a spread of Sr–Mg bond distances ranging from 3.57–4.02 Å. There are four inequivalent Mg sites. In the first Mg site, Mg is bonded to four equivalent Sr and eight Mg atoms to form a mixture of distorted edge, face, and corner-sharing MgSr4Mg8 cuboctahedra. All Mg–Mg bond lengths are 3.10 Å. In the second Mg site, Mg is bonded in a 9-coordinate geometry to three equivalent Sr and six Mg atoms. Both Mg–Mg bond lengths are 3.10 Å. In the third Mg site, Mg is bonded in a 9-coordinate geometry to three equivalent Sr and six Mg atoms. Both Mg–Mg bond lengths are 3.10 Å. In the fourth Mg site, Mg is bonded to four equivalent Sr and eight Mg atoms to form a mixture of distorted edge, face, and corner-sharing MgSr4Mg8 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrMg5 by Materials Project

SrMg5 crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Sr is bonded to six equivalent Sr and six equivalent Mg atoms to form SrSr6Mg6 cuboctahedra that share corners with six equivalent SrSr6Mg6 cuboctahedra, corners with twelve equivalent MgMg6 cuboctahedra, edges with six equivalent SrSr6Mg6 cuboctahedra, faces with two equivalent MgMg6 cuboctahedra, and faces with six equivalent SrSr6Mg6 cuboctahedra. All Sr–Sr bond lengths are 3.52 Å. All Sr–Mg bond lengths are 3.60 Å. There are three inequivalent Mg sites. In the first Mg site, Mg is bonded in a 12-coordinate geometry to three equivalent Sr and three equivalent Mg atoms. All Mg–Mg bond lengths are 3.11 Å. In the second Mg site, Mg is bonded to six Mg atoms to form distorted MgMg6 cuboctahedra that share corners with six equivalent SrSr6Mg6 cuboctahedra, corners with six equivalent MgMg6 cuboctahedra, edges with six equivalent MgMg6 cuboctahedra, a faceface with one SrSr6Mg6 cuboctahedra, and a faceface with one MgMg6 cuboctahedra. All Mg–Mg bond lengths are 3.12 Å. In the third Mg site, Mg is bonded to six equivalent Mg atoms to form distorted edge-sharing MgMg6 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrMg5 by Materials Project

SrMg5 crystallizes in the trigonal R32 space group. The structure is three-dimensional. Sr is bonded to twelve Mg atoms to form SrMg12 cuboctahedra that share corners with six equivalent SrMg12 cuboctahedra, corners with twelve equivalent MgSr3Mg9 cuboctahedra, edges with six equivalent SrMg12 cuboctahedra, edges with twelve equivalent MgSr2Mg10 cuboctahedra, and faces with twenty MgSr2Mg10 cuboctahedra. There are six shorter (3.34 Å) and six longer (3.48 Å) Sr–Mg bond lengths. There are two inequivalent Mg sites. In the first Mg site, Mg is bonded to two equivalent Sr and ten Mg atoms to form distorted MgSr2Mg10 cuboctahedra that share corners with eighteen equivalent MgSr2Mg10 cuboctahedra, edges with four equivalent SrMg12 cuboctahedra, edges with fourteen MgSr2Mg10 cuboctahedra, faces with four equivalent SrMg12 cuboctahedra, and faces with sixteen MgSr2Mg10 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.28–3.48 Å. In the second Mg site, Mg is bonded to three equivalent Sr and nine Mg atoms to form distorted MgSr3Mg9 cuboctahedra that share corners with six equivalent SrMg12 cuboctahedra, corners with twelve equivalent MgSr3Mg9 cuboctahedra, edges with eighteen MgSr2Mg10 cuboctahedra, faces with four equivalent SrMg12 cuboctahedra, and faces with sixteen MgSr2Mg10 cuboctahedra. All Mg–Mg bond lengths are 3.34 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrMg5 by Materials Project

SrMg5 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Sr is bonded to two equivalent Sr and ten Mg atoms to form distorted SrSr2Mg10 cuboctahedra that share corners with six equivalent SrSr2Mg10 cuboctahedra, corners with twelve MgSr2Mg10 cuboctahedra, edges with fourteen MgMg10 cuboctahedra, faces with four equivalent SrSr2Mg10 cuboctahedra, and faces with six MgMg10 cuboctahedra. Both Sr–Sr bond lengths are 3.51 Å. There are a spread of Sr–Mg bond distances ranging from 3.46–3.66 Å. There are five inequivalent Mg sites. In the first Mg site, Mg is bonded to ten Mg atoms to form distorted MgMg10 cuboctahedra that share corners with eight MgMg10 cuboctahedra, edges with eight equivalent SrSr2Mg10 cuboctahedra, faces with two equivalent SrSr2Mg10 cuboctahedra, and faces with fourteen MgMg10 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.10–3.28 Å. In the second Mg site, Mg is bonded in a 10-coordinate geometry to four equivalent Sr and six Mg atoms. There are two shorter (3.20 Å) and two longer (3.51 Å) Mg–Mg bond lengths. In the third Mg site, Mg is bonded in a 2-coordinate geometry to two equivalent Sr and eight Mg atoms. There are four shorter (3.29 Å) and two longer (3.51 Å) Mg–Mg bond lengths. In the fourth Mg site, Mg is bonded to two equivalent Sr and ten Mg atoms to form distorted MgSr2Mg10 cuboctahedra that share corners with six equivalent SrSr2Mg10 cuboctahedra, corners with twelve MgSr2Mg10 cuboctahedra, edges with three equivalent SrSr2Mg10 cuboctahedra, edges with three equivalent MgSr2Mg10 cuboctahedra, faces with two equivalent SrSr2Mg10 cuboctahedra, and faces with twelve MgMg10 cuboctahedra. There are two shorter (3.13 Å) and two longer (3.51 Å) Mg–Mg bond lengths. In the fifth Mg site, Mg is bonded to two equivalent Sr and ten Mg atoms to form distorted MgSr2Mg10 cuboctahedra that share corners with six equivalent SrSr2Mg10 cuboctahedra, corners with sixteen MgMg10 cuboctahedra, edges with three equivalent SrSr2Mg10 cuboctahedra, edges with three equivalent MgSr2Mg10 cuboctahedra, faces with two equivalent SrSr2Mg10 cuboctahedra, and faces with ten MgMg10 cuboctahedra. Both Mg–Mg bond lengths are 3.51 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrMg by Materials Project

SrMg crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Sr is bonded to five equivalent Mg atoms to form a mixture of edge and corner-sharing SrMg5 trigonal bipyramids. There are three shorter (3.48 Å) and two longer (3.55 Å) Sr–Mg bond lengths. Mg is bonded to five equivalent Sr atoms to form a mixture of edge and corner-sharing MgSr5 trigonal bipyramids.

36 MATERIALS SCIENCE↗