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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Y3(B3Os4)2 by Materials Project

Y3Os8B6 crystallizes in the orthorhombic Fmmm space group. The structure is three-dimensional. there are two inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded to twelve Os+1.88- atoms to form YOs12 cuboctahedra that share edges with six equivalent YOs12 cuboctahedra and faces with six equivalent BOs6 pentagonal pyramids. There are four shorter (3.10 Å) and eight longer (3.19 Å) Y–Os bond lengths. In the second Y3+ site, Y3+ is bonded in a 10-coordinate geometry to ten Os+1.88- atoms. There are a spread of Y–Os bond distances ranging from 3.03–3.28 Å. There are three inequivalent Os+1.88- sites. In the first Os+1.88- site, Os+1.88- is bonded in a 4-coordinate geometry to four Y3+ and four B1+ atoms. There are two shorter (2.21 Å) and two longer (2.24 Å) Os–B bond lengths. In the second Os+1.88- site, Os+1.88- is bonded in a distorted square co-planar geometry to four Y3+ and four B1+ atoms. There are two shorter (2.21 Å) and two longer (2.26 Å) Os–B bond lengths. In the third Os+1.88- site, Os+1.88- is bonded in a 4-coordinate geometry to four equivalent Y3+ and four equivalent B1+ atoms. All Os–B bond lengths are 2.14 Å. There are two inequivalent B1+ sites. In the first B1+ site, B1+ is bonded in a distorted pentagonal planar geometry to five Os+1.88- atoms. In the second B1+ site, B1+ is bonded to six Os+1.88- atoms to form distorted BOs6 pentagonal pyramids that share edges with three equivalent BOs6 pentagonal pyramids and faces with three equivalent YOs12 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on YB4Os by Materials Project

YOsB4 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. Y3+ is bonded in a 2-coordinate geometry to fourteen B+1.50- atoms. There are a spread of Y–B bond distances ranging from 2.65–2.78 Å. Os3+ is bonded in a 10-coordinate geometry to ten B+1.50- atoms. There are a spread of Os–B bond distances ranging from 2.26–2.42 Å. There are four inequivalent B+1.50- sites. In the first B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to four equivalent Y3+, two equivalent Os3+, and three B+1.50- atoms. There are a spread of B–B bond distances ranging from 1.75–1.88 Å. In the second B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to four equivalent Y3+, two equivalent Os3+, and three B+1.50- atoms. The B–B bond length is 1.85 Å. In the third B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to four equivalent Y3+, two equivalent Os3+, and three B+1.50- atoms. There is one shorter (1.74 Å) and one longer (1.77 Å) B–B bond length. In the fourth B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to two equivalent Y3+, four equivalent Os3+, and three B+1.50- atoms. The B–B bond length is 1.72 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Y2B6Os by Materials Project

Y2OsB6 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. there are two inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded in a 6-coordinate geometry to fourteen B2- atoms. There are a spread of Y–B bond distances ranging from 2.73–2.82 Å. In the second Y3+ site, Y3+ is bonded to twelve B2- atoms to form a mixture of edge and face-sharing YB12 cuboctahedra. There are a spread of Y–B bond distances ranging from 2.61–2.63 Å. Os6+ is bonded in a 10-coordinate geometry to ten B2- atoms. There are a spread of Os–B bond distances ranging from 2.35–2.41 Å. There are six inequivalent B2- sites. In the first B2- site, B2- is bonded in a 9-coordinate geometry to four equivalent Y3+, two equivalent Os6+, and three B2- atoms. There are a spread of B–B bond distances ranging from 1.78–1.84 Å. In the second B2- site, B2- is bonded in a 9-coordinate geometry to four Y3+, two equivalent Os6+, and three B2- atoms. Both B–B bond lengths are 1.81 Å. In the third B2- site, B2- is bonded in a 9-coordinate geometry to four Y3+, two equivalent Os6+, and three B2- atoms. There is one shorter (1.73 Å) and one longer (1.88 Å) B–B bond length. In the fourth B2- site, B2- is bonded in a 9-coordinate geometry to four Y3+, two equivalent Os6+, and three B2- atoms. There is one shorter (1.79 Å) and one longer (1.80 Å) B–B bond length. In the fifth B2- site, B2- is bonded in a 9-coordinate geometry to four Y3+, two equivalent Os6+, and three B2- atoms. In the sixth B2- site, B2- is bonded in a 9-coordinate geometry to six Y3+ and three B2- atoms. The B–B bond length is 2.17 Å.

36 MATERIALS SCIENCE↗