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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Y5(Si7Os2)2 by Materials Project

Y5(Os2Si7)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded to two equivalent Os+1.75- and ten Si+0.57- atoms to form a mixture of distorted edge, face, and corner-sharing YSi10Os2 cuboctahedra. There are one shorter (3.16 Å) and one longer (3.17 Å) Y–Os bond lengths. There are a spread of Y–Si bond distances ranging from 2.99–3.20 Å. In the second Y3+ site, Y3+ is bonded to two equivalent Os+1.75- and ten Si+0.57- atoms to form a mixture of distorted edge, face, and corner-sharing YSi10Os2 cuboctahedra. There are one shorter (3.16 Å) and one longer (3.18 Å) Y–Os bond lengths. There are a spread of Y–Si bond distances ranging from 2.98–3.16 Å. In the third Y3+ site, Y3+ is bonded in a 4-coordinate geometry to six Os+1.75- and twelve Si+0.57- atoms. There are a spread of Y–Os bond distances ranging from 3.13–3.21 Å. There are a spread of Y–Si bond distances ranging from 2.99–3.20 Å. There are two inequivalent Os+1.75- sites. In the first Os+1.75- site, Os+1.75- is bonded in a 7-coordinate geometry to two equivalent Y3+ and seven Si+0.57- atoms. There are a spread of Os–Si bond distances ranging from 2.33–2.59 Å. In the second Os+1.75- site, Os+1.75- is bonded in a 5-coordinate geometry to five Y3+ and five Si+0.57- atoms. There are a spread of Os–Si bond distances ranging from 2.39–2.44 Å. There are seven inequivalent Si+0.57- sites. In the first Si+0.57- site, Si+0.57- is bonded in a 2-coordinate geometry to three Y3+, two Os+1.75-, and three Si+0.57- atoms. There are a spread of Si–Si bond distances ranging from 2.42–2.69 Å. In the second Si+0.57- site, Si+0.57- is bonded in a 1-coordinate geometry to six Y3+, one Os+1.75-, and two Si+0.57- atoms. There are one shorter (2.44 Å) and one longer (2.46 Å) Si–Si bond lengths. In the third Si+0.57- site, Si+0.57- is bonded in a 8-coordinate geometry to six Y3+ and two Si+0.57- atoms. The Si–Si bond length is 2.41 Å. In the fourth Si+0.57- site, Si+0.57- is bonded in a 2-coordinate geometry to three Y3+, two Os+1.75-, and three Si+0.57- atoms. There are one shorter (2.44 Å) and one longer (2.70 Å) Si–Si bond lengths. In the fifth Si+0.57- site, Si+0.57- is bonded in a 2-coordinate geometry to three Y3+, two Os+1.75-, and three Si+0.57- atoms. There are one shorter (2.56 Å) and one longer (2.69 Å) Si–Si bond lengths. In the sixth Si+0.57- site, Si+0.57- is bonded in a 1-coordinate geometry to three Y3+, two Os+1.75-, and three Si+0.57- atoms. The Si–Si bond length is 2.68 Å. In the seventh Si+0.57- site, Si+0.57- is bonded in a 5-coordinate geometry to two equivalent Y3+, three equivalent Os+1.75-, and four Si+0.57- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Y3(Si3Os)4 by Materials Project

Y3(OsSi3)4 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. there are two inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded in a 4-coordinate geometry to four Os+0.25- and twelve Si+0.67- atoms. There are two shorter (3.25 Å) and two longer (3.27 Å) Y–Os bond lengths. There are a spread of Y–Si bond distances ranging from 3.00–3.24 Å. In the second Y3+ site, Y3+ is bonded in a 12-coordinate geometry to six Os+0.25- and twelve Si+0.67- atoms. There are two shorter (3.15 Å) and four longer (3.22 Å) Y–Os bond lengths. There are a spread of Y–Si bond distances ranging from 3.04–3.11 Å. There are twelve inequivalent Os+0.25- sites. In the first Os+0.25- site, Os+0.25- is bonded in a 7-coordinate geometry to two equivalent Y3+ and seven Si+0.67- atoms. There are a spread of Os–Si bond distances ranging from 2.37–2.54 Å. In the second Os+0.25- site, Os+0.25- is bonded in a 7-coordinate geometry to two equivalent Y3+ and seven Si+0.67- atoms. There are a spread of Os–Si bond distances ranging from 2.37–2.54 Å. In the third Os+0.25- site, Os+0.25- is bonded in a 7-coordinate geometry to two equivalent Y3+ and seven Si+0.67- atoms. There are a spread of Os–Si bond distances ranging from 2.37–2.54 Å. In the fourth Os+0.25- site, Os+0.25- is bonded in a 5-coordinate geometry to five Y3+ and five Si+0.67- atoms. The Os–Y bond length is 3.15 Å. There are one shorter (2.34 Å) and four longer (2.43 Å) Os–Si bond lengths. In the fifth Os+0.25- site, Os+0.25- is bonded in a 5-coordinate geometry to five Y3+ and five Si+0.67- atoms. There are one shorter (2.34 Å) and four longer (2.43 Å) Os–Si bond lengths. In the sixth Os+0.25- site, Os+0.25- is bonded in a 5-coordinate geometry to five Y3+ and five Si+0.67- atoms. The Os–Y bond length is 3.15 Å. There are one shorter (2.34 Å) and four longer (2.43 Å) Os–Si bond lengths. In the seventh Os+0.25- site, Os+0.25- is bonded in a 7-coordinate geometry to two equivalent Y3+ and seven Si+0.67- atoms. Both Os–Y bond lengths are 3.22 Å. There are a spread of Os–Si bond distances ranging from 2.37–2.54 Å. In the eighth Os+0.25- site, Os+0.25- is bonded in a 7-coordinate geometry to two equivalent Y3+ and seven Si+0.67- atoms. Both Os–Y bond lengths are 3.22 Å. There are a spread of Os–Si bond distances ranging from 2.37–2.54 Å. In the ninth Os+0.25- site, Os+0.25- is bonded in a 7-coordinate geometry to two equivalent Y3+ and seven Si+0.67- atoms. Both Os–Y bond lengths are 3.22 Å. There are a spread of Os–Si bond distances ranging from 2.37–2.54 Å. In the tenth Os+0.25- site, Os+0.25- is bonded in a 5-coordinate geometry to five Y3+ and five Si+0.67- atoms. There are a spread of Os–Y bond distances ranging from 3.15–3.27 Å. There are one shorter (2.34 Å) and four longer (2.43 Å) Os–Si bond lengths. In the eleventh Os+0.25- site, Os+0.25- is bonded in a 5-coordinate geometry to five Y3+ and five Si+0.67- atoms. There are a spread of Os–Y bond distances ranging from 3.15–3.27 Å. There are one shorter (2.34 Å) and four longer (2.43 Å) Os–Si bond lengths. In the twelfth Os+0.25- site, Os+0.25- is bonded in a 5-coordinate geometry to five Y3+ and five Si+0.67- atoms. There are a spread of Os–Y bond distances ranging from 3.15–3.27 Å. There are one shorter (2.34 Å) and four longer (2.43 Å) Os–Si bond lengths. There are seven inequivalent Si+0.67- sites. In the first Si+0.67- site, Si+0.67- is bonded in a 1-coordinate geometry to four equivalent Y3+, one Os+0.25-, and four Si+0.67- atoms. All Si–Si bond lengths are 2.47 Å. In the second Si+0.67- site, Si+0.67- is bonded in a 9-coordinate geometry to two equivalent Y3+, three Os+0.25-, and four Si+0.67- atoms. The Si–Os bond length is 2.37 Å. There are two shorter (2.63 Å) and two longer (2.64 Å) Si–Si bond lengths. In the third Si+0.67- site, Si+0.67- is bonded in a 9-coordinate geometry to two equivalent Y3+, three Os+0.25-, and four Si+0.67- atoms. There are two shorter (2.63 Å) and two longer (2.64 Å) Si–Si bond lengths. In the fourth Si+0.67- site, Si+0.67- is bonded in a 9-coordinate geometry to two equivalent Y3+, three Os+0.25-, and four Si+0.67- atoms. There are two shorter (2.63 Å) and two longer (2.64 Å) Si–Si bond lengths. In the fifth Si+0.67- site, Si+0.67- is bonded in a 2-coordinate geometry to three Y3+, two Os+0.25-, and four Si+0.67- atoms. There are one shorter (2.59 Å) and one longer (2.68 Å) Si–Si bond lengths. In the sixth Si+0.67- site, Si+0.67- is bonded in a 2-coordinate geometry to three Y3+, two Os+0.25-, and four Si+0.67- atoms. In the seventh Si+0.67- site, Si+0.67- is bonded in a 9-coordinate geometry to two equivalent Y3+, three Os+0.25-, and four Si+0.67- atoms. There are one shorter (3.04 Å) and one longer (3.05 Å) Si–Y bond lengths. There are two shorter (2.63 Å) and two longer (2.64 Å) Si–Si bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Y(SiOs)2 by Materials Project

Y(OsSi)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Y3+ is bonded in a 8-coordinate geometry to eight equivalent Os+1.50- atoms. All Y–Os bond lengths are 3.19 Å. Os+1.50- is bonded in a 4-coordinate geometry to four equivalent Y3+ and four equivalent Si atoms. All Os–Si bond lengths are 2.40 Å. Si is bonded in a 5-coordinate geometry to four equivalent Os+1.50- and one Si atom. The Si–Si bond length is 2.49 Å.

36 MATERIALS SCIENCE↗