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.
PtTe crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of six PtTe sheets oriented in the (0, 0, 1) direction. Pt2+ is bonded in a distorted trigonal non-coplanar geometry to three equivalent Te2- atoms. All Pt–Te bond lengths are 2.63 Å. Te2- is bonded in a 3-coordinate geometry to three equivalent Pt2+ atoms.
PtTe is Caswellsilverite-derived structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Pt2+ is bonded to six equivalent Te2- atoms to form a mixture of corner, edge, and face-sharing PtTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. All Pt–Te bond lengths are 2.84 Å. Te2- is bonded in a 6-coordinate geometry to six equivalent Pt2+ atoms.
Er7(PtTe)2 crystallizes in the orthorhombic Imm2 space group. The structure is three-dimensional. there are four inequivalent Er sites. In the first Er site, Er is bonded in a 5-coordinate geometry to two equivalent Pt and three Te atoms. Both Er–Pt bond lengths are 2.84 Å. There are one shorter (3.12 Å) and two longer (3.19 Å) Er–Te bond lengths. In the second Er site, Er is bonded in a 4-coordinate geometry to three equivalent Pt and one Te atom. There are two shorter (2.85 Å) and one longer (3.16 Å) Er–Pt bond lengths. The Er–Te bond length is 3.16 Å. In the third Er site, Er is bonded in a 4-coordinate geometry to two equivalent Pt and two equivalent Te atoms. Both Er–Pt bond lengths are 2.88 Å. Both Er–Te bond lengths are 3.16 Å. In the fourth Er site, Er is bonded in a 3-coordinate geometry to three Te atoms. There are two shorter (3.20 Å) and one longer (3.24 Å) Er–Te bond lengths. Pt is bonded in a 7-coordinate geometry to seven Er atoms. There are two inequivalent Te sites. In the first Te site, Te is bonded in a 8-coordinate geometry to eight Er atoms. In the second Te site, Te is bonded in a 7-coordinate geometry to seven Er atoms.
Dy7(PtTe)2 crystallizes in the orthorhombic Imm2 space group. The structure is three-dimensional. there are four inequivalent Dy sites. In the first Dy site, Dy is bonded in a 5-coordinate geometry to two equivalent Pt and three Te atoms. Both Dy–Pt bond lengths are 2.88 Å. There are one shorter (3.13 Å) and two longer (3.21 Å) Dy–Te bond lengths. In the second Dy site, Dy is bonded in a 4-coordinate geometry to three equivalent Pt and one Te atom. There are two shorter (2.87 Å) and one longer (3.18 Å) Dy–Pt bond lengths. The Dy–Te bond length is 3.19 Å. In the third Dy site, Dy is bonded in a 4-coordinate geometry to two equivalent Pt and two equivalent Te atoms. Both Dy–Pt bond lengths are 2.91 Å. Both Dy–Te bond lengths are 3.17 Å. In the fourth Dy site, Dy is bonded in a 3-coordinate geometry to three Te atoms. There are two shorter (3.21 Å) and one longer (3.26 Å) Dy–Te bond lengths. Pt is bonded in a 7-coordinate geometry to seven Dy atoms. There are two inequivalent Te sites. In the first Te site, Te is bonded in a 8-coordinate geometry to eight Dy atoms. In the second Te site, Te is bonded in a 7-coordinate geometry to seven Dy atoms.