Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “cluster structure”

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.

At least 1,747 records · Page 97
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on AlPNCl5 by Materials Project

AlPNCl5 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one AlPNCl5 cluster. Al3+ is bonded to two equivalent N3- and two Cl1- atoms to form AlN2Cl2 tetrahedra that share corners with two equivalent PNCl3 tetrahedra and an edgeedge with one AlN2Cl2 tetrahedra. Both Al–N bond lengths are 1.90 Å. There are one shorter (2.12 Å) and one longer (2.13 Å) Al–Cl bond lengths. P5+ is bonded to one N3- and three Cl1- atoms to form PNCl3 tetrahedra that share corners with two equivalent AlN2Cl2 tetrahedra. The P–N bond length is 1.56 Å. There are a spread of P–Cl bond distances ranging from 1.99–2.01 Å. N3- is bonded in a distorted T-shaped geometry to two equivalent Al3+ and one P5+ atom. There are five inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one P5+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one P5+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Al3+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one P5+ atom. In the fifth Cl1- site, Cl1- is bonded in a single-bond geometry to one Al3+ atom.

36 MATERIALS SCIENCE↗
NASA NTRS1968

Suspended chains damp wind-induced oscillations of tall flexible structures

Hanging-chain system, which is a form of impact damper, suppresses wind-induced bending oscillations of tall cylindrical antenna masts. A cluster of chains enclosed in a neoprene shroud is suspended inside the tip of the antenna mast, forming a simple method of damping structural vibrations.

Reed, W. H., III↗
DOE OSTI2020

Materials Data on CN6O by Materials Project

CN6O is alpha Niobium phosphide-derived structured and crystallizes in the orthorhombic Pnma space group. The structure is zero-dimensional and consists of four CN6O clusters. C4+ is bonded in a trigonal planar geometry to two N+0.33- and one O2- atom. Both C–N bond lengths are 1.41 Å. The C–O bond length is 1.22 Å. There are six inequivalent N+0.33- sites. In the first N+0.33- site, N+0.33- is bonded in a distorted bent 120 degrees geometry to one C4+ and one N+0.33- atom. The N–N bond length is 1.24 Å. In the second N+0.33- site, N+0.33- is bonded in a distorted linear geometry to two N+0.33- atoms. The N–N bond length is 1.14 Å. In the third N+0.33- site, N+0.33- is bonded in a single-bond geometry to one N+0.33- atom. In the fourth N+0.33- site, N+0.33- is bonded in a distorted bent 120 degrees geometry to one C4+ and one N+0.33- atom. The N–N bond length is 1.25 Å. In the fifth N+0.33- site, N+0.33- is bonded in a distorted linear geometry to two N+0.33- atoms. The N–N bond length is 1.14 Å. In the sixth N+0.33- site, N+0.33- is bonded in a single-bond geometry to one N+0.33- atom. O2- is bonded in a single-bond geometry to one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BH5CN2 by Materials Project

BCN2H5 crystallizes in the orthorhombic Pna2_1 space group. The structure is zero-dimensional and consists of four BCN2H5 clusters. B3+ is bonded in a tetrahedral geometry to one C2-, one N3-, and two H1+ atoms. The B–C bond length is 1.57 Å. The B–N bond length is 1.59 Å. There is one shorter (1.21 Å) and one longer (1.22 Å) B–H bond length. C2- is bonded in a linear geometry to one B3+ and one N3- atom. The C–N bond length is 1.17 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a single-bond geometry to one C2- atom. In the second N3- site, N3- is bonded in a tetrahedral geometry to one B3+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are five inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one B3+ atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one B3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AsH3CNOF9 by Materials Project

CNH3OF3AsF6 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two AsF6 clusters and two CNH3OF3 clusters. In each AsF6 cluster, As5+ is bonded in an octahedral geometry to six F1- atoms. There are a spread of As–F bond distances ranging from 1.76–1.79 Å. There are six inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one As5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one As5+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one As5+ atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one As5+ atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one As5+ atom. In the sixth F1- site, F1- is bonded in a single-bond geometry to one As5+ atom. In each CNH3OF3 cluster, C4+ is bonded in a tetrahedral geometry to one N1- and three F1- atoms. The C–N bond length is 1.53 Å. There is two shorter (1.33 Å) and one longer (1.34 Å) C–F bond length. N1- is bonded in a distorted tetrahedral geometry to one C4+, two H1+, and one O2- atom. Both N–H bond lengths are 1.05 Å. The N–O bond length is 1.41 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N1- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N1- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. O2- is bonded in a water-like geometry to one N1- and one H1+ atom. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one C4+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one C4+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SbXeF9 by Materials Project

XeSbF9 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four XeSbF9 clusters. Xe is bonded in a 4-coordinate geometry to four F atoms. There are a spread of Xe–F bond distances ranging from 1.97–2.42 Å. Sb is bonded in an octahedral geometry to six F atoms. There are a spread of Sb–F bond distances ranging from 1.89–2.01 Å. There are nine inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one Sb atom. In the second F site, F is bonded in a single-bond geometry to one Sb atom. In the third F site, F is bonded in a single-bond geometry to one Sb atom. In the fourth F site, F is bonded in a single-bond geometry to one Sb atom. In the fifth F site, F is bonded in a single-bond geometry to one Sb atom. In the sixth F site, F is bonded in a distorted bent 150 degrees geometry to one Xe and one Sb atom. In the seventh F site, F is bonded in a single-bond geometry to one Xe atom. In the eighth F site, F is bonded in a single-bond geometry to one Xe atom. In the ninth F site, F is bonded in a single-bond geometry to one Xe atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CS3N4 by Materials Project

CN4S3 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four CN4S3 clusters. C4+ is bonded in a linear geometry to two N+0.50+ atoms. There is one shorter (1.18 Å) and one longer (1.31 Å) C–N bond length. There are four inequivalent N+0.50+ sites. In the first N+0.50+ site, N+0.50+ is bonded in a single-bond geometry to one C4+ atom. In the second N+0.50+ site, N+0.50+ is bonded in a bent 120 degrees geometry to one C4+ and one S2- atom. The N–S bond length is 1.60 Å. In the third N+0.50+ site, N+0.50+ is bonded in a bent 120 degrees geometry to two S2- atoms. There is one shorter (1.57 Å) and one longer (1.61 Å) N–S bond length. In the fourth N+0.50+ site, N+0.50+ is bonded in a bent 120 degrees geometry to two S2- atoms. There is one shorter (1.60 Å) and one longer (1.64 Å) N–S bond length. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a water-like geometry to two N+0.50+ atoms. In the second S2- site, S2- is bonded in a single-bond geometry to one N+0.50+ atom. In the third S2- site, S2- is bonded in a distorted water-like geometry to two N+0.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TeCl4 by Materials Project

TeCl4 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four TeCl4 clusters. there are two inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded to six Cl1- atoms to form edge-sharing TeCl6 octahedra. There are a spread of Te–Cl bond distances ranging from 2.37–2.94 Å. In the second Te4+ site, Te4+ is bonded to six Cl1- atoms to form edge-sharing TeCl6 octahedra. There are a spread of Te–Cl bond distances ranging from 2.36–2.96 Å. There are eight inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Te4+ atom. In the second Cl1- site, Cl1- is bonded in a 3-coordinate geometry to three Te4+ atoms. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Te4+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Te4+ atom. In the fifth Cl1- site, Cl1- is bonded in a single-bond geometry to one Te4+ atom. In the sixth Cl1- site, Cl1- is bonded in a single-bond geometry to one Te4+ atom. In the seventh Cl1- site, Cl1- is bonded in a single-bond geometry to one Te4+ atom. In the eighth Cl1- site, Cl1- is bonded in a 3-coordinate geometry to three Te4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TeBr4 by Materials Project

TeBr4 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four TeBr4 clusters. there are two inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded to six Br1- atoms to form edge-sharing TeBr6 octahedra. There are a spread of Te–Br bond distances ranging from 2.54–3.11 Å. In the second Te4+ site, Te4+ is bonded to six Br1- atoms to form edge-sharing TeBr6 octahedra. There are a spread of Te–Br bond distances ranging from 2.55–3.09 Å. There are eight inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a single-bond geometry to one Te4+ atom. In the second Br1- site, Br1- is bonded in a single-bond geometry to one Te4+ atom. In the third Br1- site, Br1- is bonded in a 3-coordinate geometry to three Te4+ atoms. In the fourth Br1- site, Br1- is bonded in a single-bond geometry to one Te4+ atom. In the fifth Br1- site, Br1- is bonded in a single-bond geometry to one Te4+ atom. In the sixth Br1- site, Br1- is bonded in a single-bond geometry to one Te4+ atom. In the seventh Br1- site, Br1- is bonded in a single-bond geometry to one Te4+ atom. In the eighth Br1- site, Br1- is bonded in a 3-coordinate geometry to three Te4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MnC4Br3N by Materials Project

MnBr3C4N crystallizes in the monoclinic P2_1 space group. The structure is one-dimensional and consists of two C4N clusters and one MnBr3 ribbon oriented in the (0, 1, 0) direction. In each C4N cluster, there are four inequivalent C1+ sites. In the first C1+ site, C1+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.55 Å. In the second C1+ site, C1+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.43 Å. In the third C1+ site, C1+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.57 Å. In the fourth C1+ site, C1+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.67 Å. N3- is bonded in a 4-coordinate geometry to four C1+ atoms. In the MnBr3 ribbon, Mn2+ is bonded to six Br1- atoms to form face-sharing MnBr6 octahedra. There are a spread of Mn–Br bond distances ranging from 2.52–2.58 Å. There are three inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a distorted L-shaped geometry to two equivalent Mn2+ atoms. In the second Br1- site, Br1- is bonded in a distorted L-shaped geometry to two equivalent Mn2+ atoms. In the third Br1- site, Br1- is bonded in a 2-coordinate geometry to two equivalent Mn2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SeCl4 by Materials Project

SeCl4 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four SeCl4 clusters. there are two inequivalent Se4+ sites. In the first Se4+ site, Se4+ is bonded to six Cl1- atoms to form edge-sharing SeCl6 octahedra. There are a spread of Se–Cl bond distances ranging from 2.22–2.80 Å. In the second Se4+ site, Se4+ is bonded to six Cl1- atoms to form distorted edge-sharing SeCl6 octahedra. There are a spread of Se–Cl bond distances ranging from 2.21–2.84 Å. There are eight inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 3-coordinate geometry to three Se4+ atoms. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Se4+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Se4+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Se4+ atom. In the fifth Cl1- site, Cl1- is bonded in a single-bond geometry to one Se4+ atom. In the sixth Cl1- site, Cl1- is bonded in a single-bond geometry to one Se4+ atom. In the seventh Cl1- site, Cl1- is bonded in a single-bond geometry to one Se4+ atom. In the eighth Cl1- site, Cl1- is bonded in a 3-coordinate geometry to three Se4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CdH4(C2O3)2 by Materials Project

CdC4H4O6 crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of nine CdC4H4O6 clusters. Cd2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Cd–O bond distances ranging from 2.26–2.39 Å. There are two inequivalent C+1.50+ sites. In the first C+1.50+ site, C+1.50+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.26 Å. In the second C+1.50+ site, C+1.50+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.26 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Cd2+ and one C+1.50+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Cd2+ and one C+1.50+ atom. In the third O2- site, O2- is bonded in a distorted water-like geometry to one Cd2+ and two H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SbS4N3 by Materials Project

SbN3S4 is High Pressure (4-7GPa) Tellurium-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one SbN3S4 cluster. Sb3+ is bonded in a 2-coordinate geometry to two S2- atoms. There are one shorter (2.54 Å) and one longer (2.71 Å) Sb–S bond lengths. There are three inequivalent N+1.67+ sites. In the first N+1.67+ site, N+1.67+ is bonded in a bent 120 degrees geometry to two S2- atoms. There is one shorter (1.61 Å) and one longer (1.70 Å) N–S bond length. In the second N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one S2- atom. The N–S bond length is 1.58 Å. In the third N+1.67+ site, N+1.67+ is bonded in a single-bond geometry to one S2- atom. The N–S bond length is 1.49 Å. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded in a bent 120 degrees geometry to two N+1.67+ atoms. In the second S2- site, S2- is bonded in a 2-coordinate geometry to one Sb3+ and one S2- atom. The S–S bond length is 2.04 Å. In the third S2- site, S2- is bonded in a distorted water-like geometry to one Sb3+ and one N+1.67+ atom. In the fourth S2- site, S2- is bonded in a distorted single-bond geometry to one N+1.67+ and one S2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H3CSNOF2 by Materials Project

CNH3SOF2 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of eight CNH3SOF2 clusters. C4+ is bonded to one N1- and three H1+ atoms to form CH3N tetrahedra that share a cornercorner with one SNOF2 tetrahedra. The C–N bond length is 1.47 Å. All C–H bond lengths are 1.10 Å. N1- is bonded in a bent 120 degrees geometry to one C4+ and one S2- atom. The N–S bond length is 1.47 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C4+ atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C4+ atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one C4+ atom. S2- is bonded to one N1-, one O2-, and two F1- atoms to form SNOF2 tetrahedra that share a cornercorner with one CH3N tetrahedra. The S–O bond length is 1.42 Å. Both S–F bond lengths are 1.61 Å. O2- is bonded in a single-bond geometry to one S2- atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one S2- atom. In the second F1- site, F1- is bonded in a single-bond geometry to one S2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H3CSNOF2 by Materials Project

CNH3SOF2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two CNH3SOF2 clusters. C4+ is bonded to one N1- and three H1+ atoms to form CH3N tetrahedra that share a cornercorner with one SNOF2 tetrahedra. The C–N bond length is 1.46 Å. All C–H bond lengths are 1.10 Å. N1- is bonded in a bent 120 degrees geometry to one C4+ and one S2- atom. The N–S bond length is 1.47 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C4+ atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C4+ atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one C4+ atom. S2- is bonded to one N1-, one O2-, and two F1- atoms to form SNOF2 tetrahedra that share a cornercorner with one CH3N tetrahedra. The S–O bond length is 1.42 Å. Both S–F bond lengths are 1.61 Å. O2- is bonded in a single-bond geometry to one S2- atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one S2- atom. In the second F1- site, F1- is bonded in a single-bond geometry to one S2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TaI4 by Materials Project

TaI4 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one TaI4 cluster. there are two inequivalent Ta4+ sites. In the first Ta4+ site, Ta4+ is bonded to six I1- atoms to form a mixture of edge and face-sharing TaI6 octahedra. There are a spread of Ta–I bond distances ranging from 2.68–2.90 Å. In the second Ta4+ site, Ta4+ is bonded to six I1- atoms to form face-sharing TaI6 octahedra. There are a spread of Ta–I bond distances ranging from 2.67–2.92 Å. There are eight inequivalent I1- sites. In the first I1- site, I1- is bonded in a water-like geometry to two equivalent Ta4+ atoms. In the second I1- site, I1- is bonded in a 2-coordinate geometry to two Ta4+ atoms. In the third I1- site, I1- is bonded in a 2-coordinate geometry to two Ta4+ atoms. In the fourth I1- site, I1- is bonded in a single-bond geometry to one Ta4+ atom. In the fifth I1- site, I1- is bonded in a single-bond geometry to one Ta4+ atom. In the sixth I1- site, I1- is bonded in a single-bond geometry to one Ta4+ atom. In the seventh I1- site, I1- is bonded in a 2-coordinate geometry to two Ta4+ atoms. In the eighth I1- site, I1- is bonded in a single-bond geometry to one Ta4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Te2PdBr6 by Materials Project

PdTe2Br6 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four PdTe2Br6 clusters. Pd4+ is bonded in an L-shaped geometry to two Br1- atoms. There are one shorter (2.51 Å) and one longer (2.58 Å) Pd–Br bond lengths. There are two inequivalent Te1+ sites. In the first Te1+ site, Te1+ is bonded in a distorted rectangular see-saw-like geometry to four Br1- atoms. There are a spread of Te–Br bond distances ranging from 2.58–3.07 Å. In the second Te1+ site, Te1+ is bonded in a 4-coordinate geometry to four Br1- atoms. There are a spread of Te–Br bond distances ranging from 2.53–3.35 Å. There are six inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a single-bond geometry to one Te1+ atom. In the second Br1- site, Br1- is bonded in a single-bond geometry to one Te1+ atom. In the third Br1- site, Br1- is bonded in a distorted L-shaped geometry to one Pd4+ and one Te1+ atom. In the fourth Br1- site, Br1- is bonded in a single-bond geometry to one Te1+ atom. In the fifth Br1- site, Br1- is bonded in a distorted single-bond geometry to two Te1+ atoms. In the sixth Br1- site, Br1- is bonded in a 1-coordinate geometry to one Pd4+ and two Te1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CoP4F12 by Materials Project

CoP4F12 is gamma plutonium structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four CoP4F12 clusters. Co2+ is bonded in a tetrahedral geometry to four P+2.50+ atoms. There are two shorter (2.13 Å) and two longer (2.15 Å) Co–P bond lengths. There are two inequivalent P+2.50+ sites. In the first P+2.50+ site, P+2.50+ is bonded in a 3-coordinate geometry to one Co2+ and three F1- atoms. All P–F bond lengths are 1.58 Å. In the second P+2.50+ site, P+2.50+ is bonded in a 3-coordinate geometry to one Co2+ and three F1- atoms. There is two shorter (1.58 Å) and one longer (1.59 Å) P–F bond length. There are six inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one P+2.50+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one P+2.50+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one P+2.50+ atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one P+2.50+ atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one P+2.50+ atom. In the sixth F1- site, F1- is bonded in a single-bond geometry to one P+2.50+ atom.

36 MATERIALS SCIENCE↗