SEARCH · Engineering Papers
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.
Nd is Tungsten structured and crystallizes in the cubic Im-3m space group. The structure is three-dimensional. Nd is bonded in a distorted body-centered cubic geometry to eight equivalent Nd atoms. All Nd–Nd bond lengths are 3.58 Å.
Pt3Al is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Pt is bonded to eight equivalent Pt and four equivalent Al atoms to form distorted PtAl4Pt8 cuboctahedra that share corners with twelve equivalent PtAl4Pt8 cuboctahedra, edges with eight equivalent AlPt12 cuboctahedra, edges with sixteen equivalent PtAl4Pt8 cuboctahedra, faces with four equivalent AlPt12 cuboctahedra, and faces with fourteen equivalent PtAl4Pt8 cuboctahedra. All Pt–Pt bond lengths are 2.77 Å. All Pt–Al bond lengths are 2.77 Å. Al is bonded to twelve equivalent Pt atoms to form AlPt12 cuboctahedra that share corners with twelve equivalent AlPt12 cuboctahedra, edges with twenty-four equivalent PtAl4Pt8 cuboctahedra, faces with six equivalent AlPt12 cuboctahedra, and faces with twelve equivalent PtAl4Pt8 cuboctahedra.
GdGe crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Gd is bonded in a 5-coordinate geometry to seven equivalent Ge atoms. There are five shorter (3.02 Å) and two longer (3.25 Å) Gd–Ge bond lengths. Ge is bonded in a 9-coordinate geometry to seven equivalent Gd and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.70 Å.
PuCo3 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent Pu sites. In the first Pu site, Pu is bonded in a distorted hexagonal planar geometry to eighteen Co atoms. There are six shorter (2.74 Å) and twelve longer (3.11 Å) Pu–Co bond lengths. In the second Pu site, Pu is bonded in a 12-coordinate geometry to twelve Co atoms. There are a spread of Pu–Co bond distances ranging from 2.79–2.89 Å. There are three inequivalent Co sites. In the first Co site, Co is bonded to six equivalent Pu and six equivalent Co atoms to form CoPu6Co6 cuboctahedra that share corners with eighteen CoPu3Co9 cuboctahedra, edges with six equivalent CoPu6Co6 cuboctahedra, and faces with twenty CoPu3Co9 cuboctahedra. All Co–Co bond lengths are 2.46 Å. In the second Co site, Co is bonded to three equivalent Pu and nine Co atoms to form distorted CoPu3Co9 cuboctahedra that share corners with eighteen CoPu6Co6 cuboctahedra, edges with six equivalent CoPu3Co9 cuboctahedra, and faces with twenty-two CoPu6Co6 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.43–2.74 Å. In the third Co site, Co is bonded to five Pu and seven Co atoms to form CoPu5Co7 cuboctahedra that share corners with twenty-one CoPu6Co6 cuboctahedra, edges with eight equivalent CoPu5Co7 cuboctahedra, and faces with twenty CoPu6Co6 cuboctahedra. There are two shorter (2.36 Å) and two longer (2.39 Å) Co–Co bond lengths.
Re2Th is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Th is bonded in a 12-coordinate geometry to twelve Re atoms. There are a spread of Th–Re bond distances ranging from 3.18–3.31 Å. There are two inequivalent Re sites. In the first Re site, Re is bonded to six equivalent Th and six equivalent Re atoms to form a mixture of edge, corner, and face-sharing ReTh6Re6 cuboctahedra. All Re–Re bond lengths are 2.84 Å. In the second Re site, Re is bonded to six equivalent Th and six Re atoms to form a mixture of edge, corner, and face-sharing ReTh6Re6 cuboctahedra. There are two shorter (2.66 Å) and two longer (2.75 Å) Re–Re bond lengths.
HfAl2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Hf is bonded in a 12-coordinate geometry to four equivalent Hf and twelve Al atoms. There are three shorter (3.23 Å) and one longer (3.25 Å) Hf–Hf bond lengths. There are a spread of Hf–Al bond distances ranging from 3.08–3.11 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded to six equivalent Hf and six equivalent Al atoms to form a mixture of edge, face, and corner-sharing AlHf6Al6 cuboctahedra. All Al–Al bond lengths are 2.68 Å. In the second Al site, Al is bonded to six equivalent Hf and six Al atoms to form a mixture of edge, face, and corner-sharing AlHf6Al6 cuboctahedra. There are two shorter (2.56 Å) and two longer (2.69 Å) Al–Al bond lengths.
DyNi crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Dy is bonded in a 7-coordinate geometry to seven equivalent Ni atoms. There are a spread of Dy–Ni bond distances ranging from 2.86–2.93 Å. Ni is bonded in a 9-coordinate geometry to seven equivalent Dy and two equivalent Ni atoms. Both Ni–Ni bond lengths are 2.55 Å.
MgPt is alpha-derived structured and crystallizes in the cubic P2_13 space group. The structure is three-dimensional. Mg2+ is bonded in a 7-coordinate geometry to seven equivalent Pt2- atoms. There are a spread of Mg–Pt bond distances ranging from 2.67–2.78 Å. Pt2- is bonded in a 7-coordinate geometry to seven equivalent Mg2+ atoms.
NbMn2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Nb is bonded in a 12-coordinate geometry to four equivalent Nb and twelve Mn atoms. There are three shorter (2.95 Å) and one longer (2.97 Å) Nb–Nb bond lengths. There are a spread of Nb–Mn bond distances ranging from 2.81–2.83 Å. There are two inequivalent Mn sites. In the first Mn site, Mn is bonded to six equivalent Nb and six Mn atoms to form a mixture of corner, edge, and face-sharing MnMn6Nb6 cuboctahedra. There are a spread of Mn–Mn bond distances ranging from 2.34–2.48 Å. In the second Mn site, Mn is bonded to six equivalent Nb and six equivalent Mn atoms to form a mixture of corner, edge, and face-sharing MnMn6Nb6 cuboctahedra.
U2Se3 is Stibnite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent U3+ sites. In the first U3+ site, U3+ is bonded to seven Se2- atoms to form a mixture of distorted corner and edge-sharing USe7 pentagonal bipyramids. There are a spread of U–Se bond distances ranging from 2.88–2.92 Å. In the second U3+ site, U3+ is bonded in a 7-coordinate geometry to eight Se2- atoms. There are a spread of U–Se bond distances ranging from 2.95–3.46 Å. There are three inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to five U3+ atoms to form a mixture of distorted corner and edge-sharing SeU5 trigonal bipyramids. In the second Se2- site, Se2- is bonded to five U3+ atoms to form a mixture of distorted corner and edge-sharing SeU5 square pyramids. In the third Se2- site, Se2- is bonded in a 4-coordinate geometry to five U3+ atoms.
Co3S4 is Hausmannite structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. there are two inequivalent Co+2.67+ sites. In the first Co+2.67+ site, Co+2.67+ is bonded to six equivalent S2- atoms to form CoS6 octahedra that share corners with six equivalent CoS4 tetrahedra and edges with six equivalent CoS6 octahedra. All Co–S bond lengths are 2.26 Å. In the second Co+2.67+ site, Co+2.67+ is bonded to four equivalent S2- atoms to form corner-sharing CoS4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. All Co–S bond lengths are 2.13 Å. S2- is bonded in a distorted rectangular see-saw-like geometry to four Co+2.67+ atoms.
HfCr2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Hf is bonded in a 12-coordinate geometry to four equivalent Hf and twelve Cr atoms. All Hf–Hf bond lengths are 3.07 Å. There are three shorter (2.89 Å) and nine longer (2.95 Å) Hf–Cr bond lengths. There are two inequivalent Cr sites. In the first Cr site, Cr is bonded to six equivalent Hf and six equivalent Cr atoms to form a mixture of edge, face, and corner-sharing CrHf6Cr6 cuboctahedra. All Cr–Cr bond lengths are 2.50 Å. In the second Cr site, Cr is bonded to six equivalent Hf and six Cr atoms to form a mixture of edge, face, and corner-sharing CrHf6Cr6 cuboctahedra. There are two shorter (2.49 Å) and two longer (2.55 Å) Cr–Cr bond lengths.
Ni3Sn crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ni is bonded to eight equivalent Ni and four equivalent Sn atoms to form NiNi8Sn4 cuboctahedra that share corners with four equivalent SnNi12 cuboctahedra, corners with fourteen equivalent NiNi8Sn4 cuboctahedra, edges with six equivalent SnNi12 cuboctahedra, edges with twelve equivalent NiNi8Sn4 cuboctahedra, faces with four equivalent SnNi12 cuboctahedra, and faces with sixteen equivalent NiNi8Sn4 cuboctahedra. There are a spread of Ni–Ni bond distances ranging from 2.54–2.76 Å. All Ni–Sn bond lengths are 2.65 Å. Sn is bonded to twelve equivalent Ni atoms to form SnNi12 cuboctahedra that share corners with six equivalent SnNi12 cuboctahedra, corners with twelve equivalent NiNi8Sn4 cuboctahedra, edges with eighteen equivalent NiNi8Sn4 cuboctahedra, faces with eight equivalent SnNi12 cuboctahedra, and faces with twelve equivalent NiNi8Sn4 cuboctahedra.
UPtSn is half-Heusler structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. U is bonded to four equivalent Pt and six equivalent Sn atoms to form a mixture of distorted corner and face-sharing USn6Pt4 tetrahedra. All U–Pt bond lengths are 2.87 Å. All U–Sn bond lengths are 3.31 Å. Pt is bonded in a body-centered cubic geometry to four equivalent U and four equivalent Sn atoms. All Pt–Sn bond lengths are 2.87 Å. Sn is bonded in a 10-coordinate geometry to six equivalent U and four equivalent Pt atoms.
Ba2MgReO6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Ba2+ is bonded to twelve equivalent O2- atoms to form BaO12 cuboctahedra that share corners with twelve equivalent BaO12 cuboctahedra, faces with six equivalent BaO12 cuboctahedra, faces with four equivalent MgO6 octahedra, and faces with four equivalent ReO6 octahedra. All Ba–O bond lengths are 2.89 Å. Mg2+ is bonded to six equivalent O2- atoms to form MgO6 octahedra that share corners with six equivalent ReO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Mg–O bond lengths are 2.14 Å. Re6+ is bonded to six equivalent O2- atoms to form ReO6 octahedra that share corners with six equivalent MgO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Re–O bond lengths are 1.95 Å. O2- is bonded in a distorted linear geometry to four equivalent Ba2+, one Mg2+, and one Re6+ atom.
Ba2ReZnO6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Ba2+ is bonded to twelve equivalent O2- atoms to form BaO12 cuboctahedra that share corners with twelve equivalent BaO12 cuboctahedra, faces with six equivalent BaO12 cuboctahedra, faces with four equivalent ReO6 octahedra, and faces with four equivalent ZnO6 octahedra. All Ba–O bond lengths are 2.91 Å. Re6+ is bonded to six equivalent O2- atoms to form ReO6 octahedra that share corners with six equivalent ZnO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Re–O bond lengths are 1.95 Å. Zn2+ is bonded to six equivalent O2- atoms to form ZnO6 octahedra that share corners with six equivalent ReO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Zn–O bond lengths are 2.16 Å. O2- is bonded in a distorted linear geometry to four equivalent Ba2+, one Re6+, and one Zn2+ atom.
Na2O2 is alpha boron-derived structured and crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. there are two inequivalent Na sites. In the first Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are four shorter (2.34 Å) and two longer (2.40 Å) Na–O bond lengths. In the second Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are two shorter (2.42 Å) and four longer (2.49 Å) Na–O bond lengths. There are two inequivalent O sites. In the first O site, O is bonded in a 7-coordinate geometry to six Na and one O atom. The O–O bond length is 1.54 Å. In the second O site, O is bonded to six Na and one O atom to form a mixture of distorted corner, edge, and face-sharing ONa6O pentagonal bipyramids. The O–O bond length is 1.55 Å.
LuB6 is Calcium hexaboride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Lu is bonded in a 1-coordinate geometry to twenty-four equivalent B atoms. All Lu–B bond lengths are 2.99 Å. B is bonded in a 1-coordinate geometry to four equivalent Lu and five equivalent B atoms. There is one shorter (1.62 Å) and four longer (1.74 Å) B–B bond length.