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.
Pr4Sb3 crystallizes in the cubic I-43d space group. The structure is three-dimensional. Pr is bonded in a 6-coordinate geometry to six equivalent Sb atoms. There are three shorter (3.19 Å) and three longer (3.45 Å) Pr–Sb bond lengths. Sb is bonded to eight equivalent Pr atoms to form a mixture of distorted edge, corner, and face-sharing SbPr8 hexagonal bipyramids.
PrSb is Tetraauricupride structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Pr3+ is bonded in a body-centered cubic geometry to eight equivalent Sb3- atoms. All Pr–Sb bond lengths are 3.40 Å. Sb3- is bonded in a body-centered cubic geometry to eight equivalent Pr3+ atoms.
PrSb2 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. Pr3+ is bonded in a 9-coordinate geometry to nine Sb+1.50- atoms. There are a spread of Pr–Sb bond distances ranging from 3.21–3.50 Å. There are two inequivalent Sb+1.50- sites. In the first Sb+1.50- site, Sb+1.50- is bonded in a 6-coordinate geometry to five equivalent Pr3+ and one Sb+1.50- atom. The Sb–Sb bond length is 2.85 Å. In the second Sb+1.50- site, Sb+1.50- is bonded in a 8-coordinate geometry to four equivalent Pr3+ and four equivalent Sb+1.50- atoms. There are two shorter (3.11 Å) and two longer (3.18 Å) Sb–Sb bond lengths.