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.
UO2CO3 crystallizes in the orthorhombic Imm2 space group. The structure is zero-dimensional and consists of two carbonic acid molecules and two pitchblend, uranium(iv) oxide, uranium(iv) dioxide, uranium dioxide molecules.
UO2CO3 crystallizes in the orthorhombic Pmmn space group. The structure is zero-dimensional and consists of two carbonic acid molecules and two pitchblend, uranium(iv) oxide, uranium(iv) dioxide, uranium dioxide molecules.
UO4CO2 crystallizes in the orthorhombic Pbca space group. The structure is zero-dimensional and consists of eight carbon dioxide molecules and four UO4 clusters. In each UO4 cluster, U is bonded to five O atoms to form distorted edge-sharing UO5 trigonal bipyramids. There are a spread of U–O bond distances ranging from 1.84–2.15 Å. There are four inequivalent O sites. In the first O site, O is bonded in a water-like geometry to two equivalent U atoms. In the second O site, O is bonded in a single-bond geometry to one U atom. In the third O site, O is bonded in a single-bond geometry to one U atom. In the fourth O site, O is bonded in a single-bond geometry to one U atom.
UO2(CO2)4 crystallizes in the orthorhombic Ccce space group. The structure is zero-dimensional and consists of sixteen formic acid molecules and four pitchblend, uranium(iv) oxide, uranium(iv) dioxide, uranium dioxide molecules.
UC4O7 is Magnesium structured and crystallizes in the orthorhombic Pbcn space group. The structure is zero-dimensional and consists of four UC4O7 clusters. U6+ is bonded in a distorted pentagonal bipyramidal geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 1.83–2.59 Å. There are two inequivalent C2+ sites. In the first C2+ site, C2+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.23 Å. In the second C2+ site, C2+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.23 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one U6+ and one C2+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one U6+ and one C2+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one U6+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one U6+ atom.
UO3(CO2)2 crystallizes in the orthorhombic Fdd2 space group. The structure is zero-dimensional and consists of sixteen carbon dioxide molecules and eight UO3 clusters. In each UO3 cluster, U6+ is bonded in a distorted T-shaped geometry to three O2- atoms. There is two shorter (1.84 Å) and one longer (1.89 Å) U–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one U6+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one U6+ atom.
UC2O7 crystallizes in the triclinic P1 space group. The structure is two-dimensional and consists of two UC2O7 sheets oriented in the (0, 0, 1) direction. U6+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 2.02–2.53 Å. There are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.20–1.46 Å. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.21–1.37 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one C4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent U6+ and one C4+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one C4+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+ and one C4+ atom. In the fifth O2- site, O2- is bonded in a single-bond geometry to one C4+ atom. In the sixth O2- site, O2- is bonded in a single-bond geometry to one C4+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent U6+ atoms.
UO4CO2 crystallizes in the monoclinic C2/c space group. The structure is one-dimensional and consists of eight carbon dioxide molecules and four UO4 ribbons oriented in the (0, 1, 0) direction. In each UO4 ribbon, U is bonded to five O atoms to form distorted corner-sharing UO5 trigonal bipyramids. There are a spread of U–O bond distances ranging from 1.83–2.27 Å. There are four inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one U atom. In the second O site, O is bonded in a single-bond geometry to one U atom. In the third O site, O is bonded in a single-bond geometry to one U atom. In the fourth O site, O is bonded in a distorted linear geometry to two equivalent U atoms.
U3(C3O8)2 crystallizes in the cubic I23 space group. The structure is zero-dimensional and consists of eight U3(C3O8)2 clusters. U+5.33+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 1.81–2.66 Å. There are two inequivalent C+2.67+ sites. In the first C+2.67+ site, C+2.67+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.22 Å. In the second C+2.67+ site, C+2.67+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.22 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one U+5.33+ atom. In the second O2- site, O2- is bonded in a trigonal non-coplanar geometry to three equivalent U+5.33+ atoms. In the third O2- site, O2- is bonded in a water-like geometry to two equivalent U+5.33+ atoms. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one U+5.33+ and one C+2.67+ atom. In the fifth O2- site, O2- is bonded in a single-bond geometry to one U+5.33+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to one U+5.33+ and one C+2.67+ atom.