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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NaBeSi3O8 by Materials Project

NaBeSi3O8 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Na is bonded in a 7-coordinate geometry to seven O atoms. There are a spread of Na–O bond distances ranging from 2.45–2.91 Å. Be is bonded to four O atoms to form BeO4 tetrahedra that share corners with four SiO4 tetrahedra and an edgeedge with one BeO4 tetrahedra. There is two shorter (1.59 Å) and two longer (1.67 Å) Be–O bond length. There are three inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There is one shorter (1.60 Å) and three longer (1.65 Å) Si–O bond length. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.64 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. There are ten inequivalent O sites. In the first O site, O is bonded in a 2-coordinate geometry to two equivalent Na, one Be, and one Si atom. In the second O site, O is bonded in a bent 150 degrees geometry to two equivalent Na atoms. In the third O site, O is bonded in a bent 150 degrees geometry to two equivalent Si atoms. In the fourth O site, O is bonded in a 2-coordinate geometry to one Na and two Si atoms. In the fifth O site, O is bonded in a bent 150 degrees geometry to two equivalent Si atoms. In the sixth O site, O is bonded in a 2-coordinate geometry to two equivalent Na, one Be, and one Si atom. In the seventh O site, O is bonded in a distorted bent 150 degrees geometry to one Na and two Si atoms. In the eighth O site, O is bonded in a distorted T-shaped geometry to two equivalent Be and one Si atom. In the ninth O site, O is bonded in a bent 150 degrees geometry to two equivalent Si atoms. In the tenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaBeSi3O8 by Materials Project

NaBeSi3O8 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.40–2.69 Å. Be is bonded to four O atoms to form BeO4 tetrahedra that share corners with four SiO4 tetrahedra and an edgeedge with one BeO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.59–1.68 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.64 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.60–1.66 Å. There are nine inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to two equivalent Si atoms. In the second O site, O is bonded in a 2-coordinate geometry to one Na, one Be, and one Si atom. In the third O site, O is bonded in a bent 150 degrees geometry to two equivalent Na atoms. In the fourth O site, O is bonded in a 2-coordinate geometry to one Na and two Si atoms. In the fifth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the sixth O site, O is bonded in a distorted T-shaped geometry to two equivalent Be and one Si atom. In the seventh O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the eighth O site, O is bonded in a 2-coordinate geometry to two equivalent Na, one Be, and one Si atom. In the ninth O site, O is bonded in a distorted bent 150 degrees geometry to one Na and two Si atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaBeSi3O8 by Materials Project

NaBeSi3O8 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Na is bonded in a 3-coordinate geometry to three O atoms. There are a spread of Na–O bond distances ranging from 2.24–2.54 Å. Be is bonded to four O atoms to form BeO4 tetrahedra that share corners with four SiO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.58–1.69 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent BeO4 tetrahedra and corners with two SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.63–1.66 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.59–1.67 Å. There are nine inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the second O site, O is bonded in a 3-coordinate geometry to one Na, one Be, and one Si atom. In the third O site, O is bonded in a bent 150 degrees geometry to one Be and one Si atom. In the fourth O site, O is bonded in a 3-coordinate geometry to one Na, one Be, and one Si atom. In the fifth O site, O is bonded in a linear geometry to two equivalent Si atoms. In the sixth O site, O is bonded in a bent 150 degrees geometry to one Be and one Si atom. In the seventh O site, O is bonded in a bent 120 degrees geometry to two Si atoms. In the eighth O site, O is bonded in a distorted trigonal planar geometry to one Na and two Si atoms. In the ninth O site, O is bonded in a linear geometry to two equivalent Si atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaBeSi3O8 by Materials Project

(Na2Be2Si6O15)2O2 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional and consists of four water molecules and one Na2Be2Si6O15 framework. In the Na2Be2Si6O15 framework, there are two inequivalent Na sites. In the first Na site, Na is bonded in a distorted rectangular see-saw-like geometry to four O atoms. There are two shorter (2.26 Å) and two longer (2.56 Å) Na–O bond lengths. In the second Na site, Na is bonded to six O atoms to form NaO6 octahedra that share corners with two equivalent SiO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.32–2.59 Å. Be is bonded in a trigonal planar geometry to three O atoms. There are a spread of Be–O bond distances ranging from 1.52–1.55 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded in a trigonal planar geometry to three O atoms. There are a spread of Si–O bond distances ranging from 1.56–1.60 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one NaO6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of Si–O bond distances ranging from 1.60–1.69 Å. In the third Si site, Si is bonded in a distorted bent 120 degrees geometry to two O atoms. There is one shorter (1.54 Å) and one longer (1.61 Å) Si–O bond length. There are eight inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the second O site, O is bonded in a linear geometry to two equivalent Be atoms. In the third O site, O is bonded in a distorted bent 150 degrees geometry to one Na, one Be, and one Si atom. In the fourth O site, O is bonded in a distorted bent 150 degrees geometry to one Na and one Si atom. In the fifth O site, O is bonded in a bent 120 degrees geometry to one Na and one Si atom. In the sixth O site, O is bonded in a bent 150 degrees geometry to one Be and one Si atom. In the seventh O site, O is bonded in a 1-coordinate geometry to two Na and one Si atom. In the eighth O site, O is bonded in a bent 120 degrees geometry to two Si atoms.

36 MATERIALS SCIENCE↗