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 1,045 records · Page 58
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on MoCl4 by Materials Project

MoCl4 crystallizes in the trigonal P-31m space group. The structure is zero-dimensional and consists of one MoCl4 cluster. Mo4+ is bonded to six Cl1- atoms to form edge-sharing MoCl6 octahedra. There are a spread of Mo–Cl bond distances ranging from 2.27–2.51 Å. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent Mo4+ atoms. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Mo4+ atom. In the third Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent Mo4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on FeSCl7 by Materials Project

FeCl4SCl3 crystallizes in the monoclinic P2_1 space group. The structure is zero-dimensional and consists of two FeCl4 clusters and four SCl3 clusters. In each FeCl4 cluster, there are two inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to five Cl1- atoms to form distorted edge-sharing FeCl5 trigonal bipyramids. There are a spread of Fe–Cl bond distances ranging from 2.22–2.50 Å. In the second Fe3+ site, Fe3+ is bonded to five Cl1- atoms to form distorted edge-sharing FeCl5 trigonal bipyramids. There are a spread of Fe–Cl bond distances ranging from 2.21–2.50 Å. There are eight inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Fe3+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Fe3+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Fe3+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Fe3+ atom. In the fifth Cl1- site, Cl1- is bonded in a water-like geometry to two Fe3+ atoms. In the sixth Cl1- site, Cl1- is bonded in a water-like geometry to two Fe3+ atoms. In the seventh Cl1- site, Cl1- is bonded in a single-bond geometry to one Fe3+ atom. In the eighth Cl1- site, Cl1- is bonded in a single-bond geometry to one Fe3+ atom. In each SCl3 cluster, S4+ is bonded in a distorted trigonal non-coplanar geometry to three Cl1- atoms. There are a spread of S–Cl bond distances ranging from 2.01–2.04 Å. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one S4+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one S4+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one S4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ir2Pt(NCl)10 by Materials Project

PtCl6(IrN5Cl2)2 is Krennerite-like structured and crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of four IrN5Cl2 clusters and two PtCl6 clusters. In each IrN5Cl2 cluster, Ir5+ is bonded in a 6-coordinate geometry to five N+0.60- and one Cl1- atom. There are a spread of Ir–N bond distances ranging from 1.80–2.31 Å. The Ir–Cl bond length is 2.44 Å. There are three inequivalent N+0.60- sites. In the first N+0.60- site, N+0.60- is bonded in an L-shaped geometry to one Ir5+ and one Cl1- atom. The N–Cl bond length is 1.54 Å. In the second N+0.60- site, N+0.60- is bonded in a single-bond geometry to one Ir5+ atom. In the third N+0.60- site, N+0.60- is bonded in a single-bond geometry to one Ir5+ atom. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a bent 120 degrees geometry to two equivalent N+0.60- atoms. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Ir5+ atom. In each PtCl6 cluster, Pt6+ is bonded in an octahedral geometry to six Cl1- atoms. There are two shorter (2.33 Å) and four longer (2.34 Å) Pt–Cl bond lengths. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Pt6+ atom. In the second Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one Pt6+ atom. In the third Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one Pt6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on WCl3 by Materials Project

WCl3 is Tungsten structured and crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of three WCl3 clusters. W3+ is bonded to five Cl1- atoms to form corner-sharing WCl5 square pyramids. There are a spread of W–Cl bond distances ranging from 2.39–2.41 Å. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two equivalent W3+ atoms. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one W3+ atom. In the third Cl1- site, Cl1- is bonded in a distorted L-shaped geometry to two equivalent W3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AuSCl7 by Materials Project

AuCl4SCl3 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four AuCl4 clusters and four SCl3 clusters. In each AuCl4 cluster, Au1+ is bonded in a rectangular see-saw-like geometry to four Cl1- atoms. There are a spread of Au–Cl bond distances ranging from 2.31–2.34 Å. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Au1+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Au1+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Au1+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Au1+ atom. In each SCl3 cluster, S6+ is bonded in a trigonal non-coplanar geometry to three Cl1- atoms. There are two shorter (2.03 Å) and one longer (2.04 Å) S–Cl bond lengths. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one S6+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one S6+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one S6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on S2NO by Materials Project

ONS2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of four ONS2 clusters. In two of the ONS2 clusters, N2- is bonded in a bent 120 degrees geometry to two S2+ atoms. There is one shorter (1.55 Å) and one longer (1.67 Å) N–S bond length. There are two inequivalent S2+ sites. In the first S2+ site, S2+ is bonded in a single-bond geometry to one N2- atom. In the second S2+ site, S2+ is bonded in a bent 120 degrees geometry to one N2- and one O2- atom. The S–O bond length is 1.48 Å. O2- is bonded in a single-bond geometry to one S2+ atom. In two of the ONS2 clusters, N2- is bonded in a bent 120 degrees geometry to two S2+ atoms. There is one shorter (1.55 Å) and one longer (1.67 Å) N–S bond length. There are two inequivalent S2+ sites. In the first S2+ site, S2+ is bonded in a single-bond geometry to one N2- atom. In the second S2+ site, S2+ is bonded in a bent 120 degrees geometry to one N2- and one O2- atom. The S–O bond length is 1.48 Å. O2- is bonded in a single-bond geometry to one S2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MoSCl7O by Materials Project

MoOCl4SCl3 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four MoOCl4 clusters and four SCl3 clusters. In each MoOCl4 cluster, Mo3+ is bonded in a 1-coordinate geometry to one O2- and four Cl1- atoms. The Mo–O bond length is 1.70 Å. There are a spread of Mo–Cl bond distances ranging from 2.34–2.47 Å. O2- is bonded in a single-bond geometry to one Mo3+ atom. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 1-coordinate geometry to one Mo3+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Mo3+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Mo3+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Mo3+ atom. In each SCl3 cluster, S6+ is bonded in a trigonal non-coplanar geometry to three Cl1- atoms. There are one shorter (2.01 Å) and two longer (2.03 Å) S–Cl bond lengths. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one S6+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one S6+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one S6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3AsH36(SeN3)4 by Materials Project

(Li(NH3)4)3AsSe4 is Silicon tetrafluoride-derived structured and crystallizes in the cubic I-43m space group. The structure is zero-dimensional and consists of two AsSe4 clusters and six Li(NH3)4 clusters. In each AsSe4 cluster, As5+ is bonded in a tetrahedral geometry to four equivalent Se2- atoms. All As–Se bond lengths are 2.35 Å. Se2- is bonded in a single-bond geometry to one As5+ atom. In each Li(NH3)4 cluster, Li1+ is bonded in a tetrahedral geometry to four equivalent N3- atoms. All Li–N bond lengths are 2.17 Å. N3- is bonded in a distorted trigonal non-coplanar geometry to one Li1+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are two 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.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NpMn(OF2)3 by Materials Project

NpMn2O5F8NpOF4 crystallizes in the monoclinic C2 space group. The structure is zero-dimensional and consists of two NpMn2O5F8 clusters and two NpOF4 clusters. In each NpMn2O5F8 cluster, Np5+ is bonded in a 7-coordinate geometry to one O2- and six F1- atoms. The Np–O bond length is 1.80 Å. There are four shorter (2.03 Å) and two longer (2.51 Å) Np–F bond lengths. Mn7+ is bonded in a tetrahedral geometry to two O2- and two F1- atoms. There is one shorter (1.59 Å) and one longer (1.60 Å) Mn–O bond length. Both Mn–F bond lengths are 1.80 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Np5+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one Mn7+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one Mn7+ atom. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted single-bond geometry to one Mn7+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Np5+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Np5+ atom. In the fourth F1- site, F1- is bonded in a distorted single-bond geometry to one Np5+ and one Mn7+ atom. In each NpOF4 cluster, Np5+ is bonded in a distorted square pyramidal geometry to one O2- and four F1- atoms. The Np–O bond length is 1.83 Å. There are two shorter (2.03 Å) and two longer (2.04 Å) Np–F bond lengths. O2- is bonded in a single-bond geometry to one Np5+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Np5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Np5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HgH9C3SI3 by Materials Project

HgI3C3H9S crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four C3H9S clusters and two HgI3 clusters. In each C3H9S cluster, there are three inequivalent C2- sites. In the first C2- site, C2- is bonded in a trigonal non-coplanar geometry to three H1+ and one S2- atom. All C–H bond lengths are 1.10 Å. The C–S bond length is 1.79 Å. In the second C2- site, C2- is bonded in a trigonal non-coplanar geometry to three H1+ and one S2- atom. There is one shorter (1.09 Å) and two longer (1.10 Å) C–H bond length. The C–S bond length is 1.80 Å. In the third C2- site, C2- is bonded in a trigonal non-coplanar geometry to three H1+ and one S2- atom. All C–H bond lengths are 1.10 Å. The C–S bond length is 1.79 Å. There are nine inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. S2- is bonded in a trigonal non-coplanar geometry to three C2- atoms. In each HgI3 cluster, Hg2+ is bonded in a 3-coordinate geometry to four I1- atoms. There are a spread of Hg–I bond distances ranging from 2.76–3.68 Å. There are three inequivalent I1- sites. In the first I1- site, I1- is bonded in a distorted L-shaped geometry to two equivalent Hg2+ atoms. In the second I1- site, I1- is bonded in a single-bond geometry to one Hg2+ atom. In the third I1- site, I1- is bonded in a single-bond geometry to one Hg2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AsClOF8 by Materials Project

AsF6OClF2 crystallizes in the orthorhombic Pna2_1 space group. The structure is zero-dimensional and consists of four AsF6 clusters and four OClF2 clusters. In each AsF6 cluster, As is bonded in an octahedral geometry to six F atoms. There are a spread of As–F bond distances ranging from 1.75–1.81 Å. There are six inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one As atom. In the second F site, F is bonded in a single-bond geometry to one As atom. In the third F site, F is bonded in a single-bond geometry to one As atom. In the fourth F site, F is bonded in a single-bond geometry to one As atom. In the fifth F site, F is bonded in a single-bond geometry to one As atom. In the sixth F site, F is bonded in a single-bond geometry to one As atom. In each OClF2 cluster, O is bonded in a single-bond geometry to one Cl atom. The O–Cl bond length is 1.39 Å. Cl is bonded in a trigonal non-coplanar geometry to one O and two F atoms. Both Cl–F bond lengths are 1.63 Å. There are two inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one Cl atom. In the second F site, F is bonded in a single-bond geometry to one Cl atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AsXeO2F7 by Materials Project

XeO2FAsF6 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is zero-dimensional and consists of four AsF6 clusters and four XeO2F clusters. In each AsF6 cluster, As is bonded in an octahedral geometry to six F atoms. There are a spread of As–F bond distances ranging from 1.74–1.82 Å. There are six inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one As atom. In the second F site, F is bonded in a single-bond geometry to one As atom. In the third F site, F is bonded in a single-bond geometry to one As atom. In the fourth F site, F is bonded in a single-bond geometry to one As atom. In the fifth F site, F is bonded in a single-bond geometry to one As atom. In the sixth F site, F is bonded in a single-bond geometry to one As atom. In each XeO2F cluster, Xe is bonded in a distorted trigonal non-coplanar geometry to two O and one F atom. Both Xe–O bond lengths are 1.84 Å. The Xe–F bond length is 2.03 Å. There are two inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Xe atom. In the second O site, O is bonded in a single-bond geometry to one Xe atom. F is bonded in a single-bond geometry to one Xe atom.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Structural transformation of metal oxo species within UiO-66 type metal–organic frameworks

Studying the coordination of actinide-based metal oxo clusters can provide valuable insights for nuclear energy technologies and radioactive waste containment. Metal–organic frameworks serve as a platform to directly interrogate the structure and properties of understudied actinide elements, including thorium. Examples of structural evolutions within Th oxo species within MOFs are rare yet relevant for nuclear waste speciation in solution. Herein, we report the serendipitous discovery of the structural evolution of Th-UiO-66 containing a hexanuclear Th node to a mononuclear Th(bdc) 2 (dmf) 2 upon the evaporation of solvent from the reaction. We observe a partial reversal of Th(bdc) 2 (dmf) 2 back to Th-UiO-66 upon hydrothermal treatment, indicating the complex dynamics of Th oxo species in solution. As a result, we report that isolated Ce-UiO-66 similarly transforms to a newly isolated 1D Ce III carboxylate chain MOF named NU-351 under the same conditions as Th-UiO-66, while Zr-UiO-66 and Hf-UiO-66 retain their structures.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2020

Materials Data on SeOF2 by Materials Project

SeOF2 crystallizes in the orthorhombic Pca2_1 space group. The structure is zero-dimensional and consists of four SeOF2 clusters. Se4+ is bonded in a distorted trigonal non-coplanar geometry to one O2- and two F1- atoms. The Se–O bond length is 1.63 Å. There is one shorter (1.77 Å) and one longer (1.79 Å) Se–F bond length. O2- is bonded in a single-bond geometry to one Se4+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Se4+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Se4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on W3Br7 by Materials Project

W3Br7 is Copper structured and crystallizes in the cubic Pn-3 space group. The structure is zero-dimensional and consists of four W3Br7 clusters. W+2.33+ is bonded to five Br1- atoms to form edge-sharing WBr5 square pyramids. There are a spread of W–Br bond distances ranging from 2.55–2.66 Å. There are three inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 6-coordinate geometry to three equivalent W+2.33+ atoms. In the second Br1- site, Br1- is bonded in a 12-coordinate geometry to three equivalent W+2.33+ atoms. In the third Br1- site, Br1- is bonded in a single-bond geometry to one W+2.33+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AsS(ClF2)3 by Materials Project

AsF6SCl3 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is zero-dimensional and consists of four AsF6 clusters and four SCl3 clusters. In each AsF6 cluster, As5+ is bonded in an octahedral geometry to six F1- atoms. There is two shorter (1.77 Å) and four longer (1.78 Å) As–F bond length. 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 SCl3 cluster, S4+ is bonded in a trigonal non-coplanar geometry to three Cl1- atoms. There is two shorter (1.99 Å) and one longer (2.00 Å) S–Cl bond length. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one S4+ atom. In the second Cl1- site, Cl1- is bonded in a 1-coordinate geometry to one S4+ atom. In the third Cl1- site, Cl1- is bonded in a 1-coordinate geometry to one S4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on S by Materials Project

S is alpha-like structured and crystallizes in the orthorhombic Pnnm space group. The structure is zero-dimensional and consists of two S clusters. there are four inequivalent S sites. In the first S site, S is bonded in a water-like geometry to two S atoms. Both S–S bond lengths are 2.07 Å. In the second S site, S is bonded in a water-like geometry to two equivalent S atoms. Both S–S bond lengths are 2.07 Å. In the third S site, S is bonded in a water-like geometry to two equivalent S atoms. In the fourth S site, S is bonded in a water-like geometry to two S atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PtF6 by Materials Project

PtF6 is beta Np structured and crystallizes in the orthorhombic Pnma space group. The structure is zero-dimensional and consists of four PtF6 clusters. Pt6+ is bonded in an octahedral geometry to six F1- atoms. All Pt–F bond lengths are 1.90 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Pt6+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Pt6+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Pt6+ atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one Pt6+ atom.

36 MATERIALS SCIENCE↗