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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Eu2SiO4 by Materials Project

Eu2SiO4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Eu2+ sites. In the first Eu2+ site, Eu2+ is bonded in a 1-coordinate geometry to ten O2- atoms. There are a spread of Eu–O bond distances ranging from 2.37–3.14 Å. In the second Eu2+ site, Eu2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Eu–O bond distances ranging from 2.51–3.09 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Si–O bond distances ranging from 1.63–1.67 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to four Eu2+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to five Eu2+ and one Si4+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to five Eu2+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu2SiO4 by Materials Project

Eu2SiO4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Eu2+ sites. In the first Eu2+ site, Eu2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Eu–O bond distances ranging from 2.39–3.00 Å. In the second Eu2+ site, Eu2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Eu–O bond distances ranging from 2.54–2.77 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Si–O bond distances ranging from 1.63–1.67 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to four Eu2+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to four Eu2+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to four Eu2+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to three Eu2+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuSiO3 by Materials Project

EuSiO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Eu2+ is bonded to twelve equivalent O2- atoms to form EuO12 cuboctahedra that share corners with twelve equivalent EuO12 cuboctahedra, faces with six equivalent EuO12 cuboctahedra, and faces with eight equivalent SiO6 octahedra. All Eu–O bond lengths are 2.63 Å. Si4+ is bonded to six equivalent O2- atoms to form SiO6 octahedra that share corners with six equivalent SiO6 octahedra and faces with eight equivalent EuO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Si–O bond lengths are 1.86 Å. O2- is bonded in a distorted linear geometry to four equivalent Eu2+ and two equivalent Si4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Eu5Si3O13 by Materials Project

Eu5Si3O13 crystallizes in the hexagonal P6_3/m space group. The structure is three-dimensional. there are two inequivalent Eu+2.80+ sites. In the first Eu+2.80+ site, Eu+2.80+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Eu–O bond distances ranging from 2.29–2.77 Å. In the second Eu+2.80+ site, Eu+2.80+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Eu–O bond distances ranging from 2.43–2.83 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There is one shorter (1.63 Å) and three longer (1.65 Å) Si–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Eu+2.80+ and one Si4+ atom. In the second O2- site, O2- is bonded in a trigonal planar geometry to three equivalent Eu+2.80+ atoms. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three Eu+2.80+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to three Eu+2.80+ and one Si4+ atom.

36 MATERIALS SCIENCE↗