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.
Sb is Copper structured and crystallizes in the tetragonal I4/mmm space group. The structure is two-dimensional and consists of two Sb sheets oriented in the (0, 0, 1) direction. Sb is bonded in a square co-planar geometry to four equivalent Sb atoms. All Sb–Sb bond lengths are 3.15 Å.
Ba3N crystallizes in the hexagonal P6_3/mcm space group. The structure is one-dimensional and consists of one Ba3N ribbon oriented in the (0, 0, 1) direction. Ba is bonded in an L-shaped geometry to two equivalent N atoms. Both Ba–N bond lengths are 2.75 Å. N is bonded to six equivalent Ba atoms to form face-sharing NBa6 octahedra.
As is alpha As structured and crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three As sheets oriented in the (0, 0, 1) direction. As is bonded in a 3-coordinate geometry to three equivalent As atoms. All As–As bond lengths are 2.56 Å.
CdTl(NO2)3 crystallizes in the trigonal R3 space group. The structure is two-dimensional and consists of three CdTl(NO2)3 sheets oriented in the (0, 0, 1) direction. Cd2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are three shorter (2.51 Å) and three longer (2.65 Å) Cd–O bond lengths. Tl3+ is bonded in a 6-coordinate geometry to three equivalent O2- atoms. All Tl–O bond lengths are 3.00 Å. N+2.33+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.26 Å) and one longer (1.27 Å) N–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Cd2+, one Tl3+, and one N+2.33+ atom. In the second O2- site, O2- is bonded in a distorted water-like geometry to one Cd2+ and one N+2.33+ atom.
PtSe2 is trigonal omega structured and crystallizes in the trigonal P-3m1 space group. The structure is two-dimensional and consists of one PtSe2 sheet oriented in the (0, 0, 1) direction. Pt4+ is bonded to six equivalent Se2- atoms to form edge-sharing PtSe6 octahedra. All Pt–Se bond lengths are 2.53 Å. Se2- is bonded in a 3-coordinate geometry to three equivalent Pt4+ atoms.
AgZr is gamma CuTi structured and crystallizes in the tetragonal P4/nmm space group. The structure is two-dimensional and consists of two AgZr sheets oriented in the (0, 0, 1) direction. Zr is bonded in a 10-coordinate geometry to four equivalent Ag atoms. All Zr–Ag bond lengths are 2.96 Å. Ag is bonded in a 10-coordinate geometry to four equivalent Zr atoms.
TaSe2 is trigonal omega structured and crystallizes in the trigonal P-3m1 space group. The structure is two-dimensional and consists of one TaSe2 sheet oriented in the (0, 0, 1) direction. Ta4+ is bonded to six equivalent Se2- atoms to form edge-sharing TaSe6 octahedra. All Ta–Se bond lengths are 2.61 Å. Se2- is bonded in a 3-coordinate geometry to three equivalent Ta4+ atoms.
GaSe is black P-derived structured and crystallizes in the trigonal R3m space group. The structure is two-dimensional and consists of six GaSe sheets oriented in the (0, 0, 1) direction. Ga2+ is bonded in a distorted trigonal non-coplanar geometry to three equivalent Se2- atoms. All Ga–Se bond lengths are 2.50 Å. Se2- is bonded in a distorted trigonal non-coplanar geometry to three equivalent Ga2+ atoms.
Hf2Pd crystallizes in the tetragonal I4/mmm space group. The structure is two-dimensional and consists of two Hf2Pd sheets oriented in the (0, 0, 1) direction. Hf is bonded in a 4-coordinate geometry to four equivalent Pd atoms. All Hf–Pd bond lengths are 2.89 Å. Pd is bonded in a body-centered cubic geometry to eight equivalent Hf atoms.
LuPb2 crystallizes in the tetragonal I4/mmm space group. The structure is two-dimensional and consists of two LuPb2 sheets oriented in the (0, 0, 1) direction. Lu is bonded in a body-centered cubic geometry to eight equivalent Pb atoms. All Lu–Pb bond lengths are 3.30 Å. Pb is bonded in a 8-coordinate geometry to four equivalent Lu atoms.
HfTe5 crystallizes in the orthorhombic Cmcm space group. The structure is one-dimensional and consists of four HfTe5 ribbons oriented in the (1, 0, 0) direction. Hf4+ is bonded in a 8-coordinate geometry to eight Te+0.80- atoms. There are a spread of Hf–Te bond distances ranging from 2.96–3.00 Å. There are three inequivalent Te+0.80- sites. In the first Te+0.80- site, Te+0.80- is bonded in a distorted L-shaped geometry to two equivalent Hf4+ atoms. In the second Te+0.80- site, Te+0.80- is bonded in a distorted single-bond geometry to one Hf4+ atom. In the third Te+0.80- site, Te+0.80- is bonded in a distorted L-shaped geometry to two equivalent Hf4+ atoms.
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.
SnS2 is trigonal omega structured and crystallizes in the trigonal P-3m1 space group. The structure is two-dimensional and consists of one SnS2 sheet oriented in the (0, 0, 1) direction. Sn4+ is bonded to six equivalent S2- atoms to form edge-sharing SnS6 octahedra. All Sn–S bond lengths are 2.60 Å. S2- is bonded in a distorted T-shaped geometry to three equivalent Sn4+ atoms.
NK3 is Bismuth triodide-like structured and crystallizes in the hexagonal P6_3/mcm space group. The structure is one-dimensional and consists of one NK3 ribbon oriented in the (0, 0, 1) direction. K1+ is bonded in an L-shaped geometry to two equivalent N3- atoms. Both K–N bond lengths are 2.73 Å. N3- is bonded to six equivalent K1+ atoms to form face-sharing NK6 octahedra.
ZrS2 is trigonal omega structured and crystallizes in the trigonal P-3m1 space group. The structure is two-dimensional and consists of one ZrS2 sheet oriented in the (0, 0, 1) direction. Zr4+ is bonded to six equivalent S2- atoms to form edge-sharing ZrS6 octahedra. All Zr–S bond lengths are 2.58 Å. S2- is bonded in a distorted T-shaped geometry to three equivalent Zr4+ atoms.
Sb2Te3 is MAX Phase-derived structured and crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three Sb2Te3 sheets oriented in the (0, 0, 1) direction. Sb3+ is bonded to six Te2- atoms to form a mixture of edge and corner-sharing SbTe6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are three shorter (3.03 Å) and three longer (3.19 Å) Sb–Te bond lengths. There are two inequivalent Te2- sites. In the first Te2- site, Te2- is bonded to six equivalent Sb3+ atoms to form edge-sharing TeSb6 octahedra. In the second Te2- site, Te2- is bonded in a 3-coordinate geometry to three equivalent Sb3+ atoms.
Ti2O is trigonal omega structured and crystallizes in the trigonal P-3m1 space group. The structure is two-dimensional and consists of one Ti2O sheet oriented in the (0, 0, 1) direction. Ti is bonded in a distorted T-shaped geometry to three equivalent O atoms. All Ti–O bond lengths are 2.15 Å. O is bonded to six equivalent Ti atoms to form edge-sharing OTi6 octahedra.
HgO crystallizes in the orthorhombic Pnma space group. The structure is one-dimensional and consists of two HgO ribbons oriented in the (0, 0, 1) direction. Hg2+ is bonded in a distorted linear geometry to two equivalent O2- atoms. There are one shorter (2.06 Å) and one longer (2.07 Å) Hg–O bond lengths. O2- is bonded in a distorted water-like geometry to two equivalent Hg2+ atoms.