SEARCH · Search NASA
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.
SmZn is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sm is bonded in a body-centered cubic geometry to eight equivalent Zn atoms. All Sm–Zn bond lengths are 3.15 Å. Zn is bonded in a body-centered cubic geometry to eight equivalent Sm atoms.
Sm2Zn17 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Sm is bonded in a 10-coordinate geometry to nineteen Zn atoms. There are a spread of Sm–Zn bond distances ranging from 3.13–3.47 Å. There are four inequivalent Zn sites. In the first Zn site, Zn is bonded to three equivalent Sm and nine Zn atoms to form distorted ZnSm3Zn9 cuboctahedra that share corners with twenty-three ZnSm2Zn10 cuboctahedra, edges with ten ZnSm2Zn10 cuboctahedra, and faces with twenty ZnSm3Zn9 cuboctahedra. There are a spread of Zn–Zn bond distances ranging from 2.57–2.88 Å. In the second Zn site, Zn is bonded in a 2-coordinate geometry to one Sm and thirteen Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.63–2.97 Å. In the third Zn site, Zn is bonded to two equivalent Sm and ten Zn atoms to form ZnSm2Zn10 cuboctahedra that share corners with twenty-two ZnSm2Zn10 cuboctahedra, edges with ten ZnSm2Zn10 cuboctahedra, and faces with eighteen ZnSm3Zn9 cuboctahedra. All Zn–Zn bond lengths are 2.60 Å. In the fourth Zn site, Zn is bonded to two equivalent Sm and ten Zn atoms to form distorted ZnSm2Zn10 cuboctahedra that share corners with twenty-four ZnSm2Zn10 cuboctahedra, edges with five ZnSm2Zn10 cuboctahedra, and faces with twenty-one ZnSm3Zn9 cuboctahedra. Both Zn–Zn bond lengths are 2.66 Å.
SmZn12 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Sm is bonded in a 12-coordinate geometry to twenty Zn atoms. There are a spread of Sm–Zn bond distances ranging from 3.18–3.42 Å. There are three inequivalent Zn sites. In the first Zn site, Zn is bonded in a distorted q6 geometry to two equivalent Sm and ten Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.60–2.88 Å. In the second Zn site, Zn is bonded to two equivalent Sm and ten Zn atoms to form a mixture of corner, edge, and face-sharing ZnSm2Zn10 cuboctahedra. There are two shorter (2.60 Å) and four longer (2.76 Å) Zn–Zn bond lengths. In the third Zn site, Zn is bonded in a 10-coordinate geometry to one Sm and nine Zn atoms. The Zn–Zn bond length is 2.59 Å.
SmZn5 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Sm is bonded in a 6-coordinate geometry to eighteen Zn atoms. There are six shorter (3.09 Å) and twelve longer (3.42 Å) Sm–Zn bond lengths. There are two inequivalent Zn sites. In the first Zn site, Zn is bonded to four equivalent Sm and eight Zn atoms to form a mixture of edge, corner, and face-sharing ZnSm4Zn8 cuboctahedra. There are four shorter (2.63 Å) and four longer (2.67 Å) Zn–Zn bond lengths. In the second Zn site, Zn is bonded in a 12-coordinate geometry to three equivalent Sm and six equivalent Zn atoms.
SmZn2 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Sm is bonded in a 12-coordinate geometry to twelve equivalent Zn atoms. There are a spread of Sm–Zn bond distances ranging from 3.11–3.32 Å. Zn is bonded in a 10-coordinate geometry to six equivalent Sm and four equivalent Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.61–2.95 Å.
Sm3Zn is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded to eight Sm and four equivalent Zn atoms to form distorted SmSm8Zn4 cuboctahedra that share corners with twelve equivalent SmSm8Zn4 cuboctahedra, edges with eight equivalent ZnSm12 cuboctahedra, edges with sixteen SmSm8Zn4 cuboctahedra, faces with four equivalent ZnSm12 cuboctahedra, and faces with fourteen SmSm8Zn4 cuboctahedra. There are four shorter (3.36 Å) and four longer (3.44 Å) Sm–Sm bond lengths. All Sm–Zn bond lengths are 3.44 Å. In the second Sm site, Sm is bonded to eight equivalent Sm and four equivalent Zn atoms to form distorted SmSm8Zn4 cuboctahedra that share corners with four equivalent SmSm8Zn4 cuboctahedra, corners with eight equivalent ZnSm12 cuboctahedra, edges with twenty-four SmSm8Zn4 cuboctahedra, faces with six equivalent ZnSm12 cuboctahedra, and faces with twelve SmSm8Zn4 cuboctahedra. All Sm–Zn bond lengths are 3.36 Å. Zn is bonded to twelve Sm atoms to form ZnSm12 cuboctahedra that share corners with four equivalent ZnSm12 cuboctahedra, corners with eight equivalent SmSm8Zn4 cuboctahedra, edges with eight equivalent ZnSm12 cuboctahedra, edges with sixteen equivalent SmSm8Zn4 cuboctahedra, faces with four equivalent ZnSm12 cuboctahedra, and faces with fourteen SmSm8Zn4 cuboctahedra.
Sm3Zn is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Sm is bonded in a 12-coordinate geometry to eight equivalent Sm and four equivalent Zn atoms. There are a spread of Sm–Sm bond distances ranging from 3.28–3.70 Å. There are two shorter (3.26 Å) and two longer (3.49 Å) Sm–Zn bond lengths. Zn is bonded to twelve equivalent Sm atoms to form a mixture of face and corner-sharing ZnSm12 cuboctahedra.
SmZn3 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Sm is bonded in a 12-coordinate geometry to fourteen Zn atoms. There are a spread of Sm–Zn bond distances ranging from 3.04–3.51 Å. There are three inequivalent Zn sites. In the first Zn site, Zn is bonded in a 10-coordinate geometry to five equivalent Sm and five Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.60–2.81 Å. In the second Zn site, Zn is bonded in a 12-coordinate geometry to five equivalent Sm and seven Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.63–3.13 Å. In the third Zn site, Zn is bonded in a 10-coordinate geometry to four equivalent Sm and six Zn atoms.