Materials Data on Y2Hf2(MoO4)7 by Materials Project

Dataset · Thu Apr 30 04:00:00 EDT 2020

DOI:https://doi.org/10.17188/1749427· OSTI ID:1749427

Y2Hf2(MoO4)7 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Y3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Y–O bond distances ranging from 2.28–2.47 Å. Hf4+ is bonded to six O2- atoms to form HfO6 octahedra that share corners with six MoO4 tetrahedra. There are a spread of Hf–O bond distances ranging from 2.05–2.10 Å. There are four inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with two equivalent HfO6 octahedra. The corner-sharing octahedra tilt angles range from 24–35°. There are a spread of Mo–O bond distances ranging from 1.75–1.84 Å. In the second Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with two equivalent HfO6 octahedra. The corner-sharing octahedra tilt angles range from 17–37°. There are a spread of Mo–O bond distances ranging from 1.77–1.84 Å. In the third Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share a cornercorner with one HfO6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are a spread of Mo–O bond distances ranging from 1.77–1.86 Å. In the fourth Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with two equivalent HfO6 octahedra. The corner-sharing octahedral tilt angles are 32°. There is two shorter (1.77 Å) and two longer (1.83 Å) Mo–O bond length. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Hf4+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a linear geometry to one Hf4+ and one Mo6+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Y3+ and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Y3+ and one Mo6+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Hf4+ and one Mo6+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Y3+ and one Mo6+ atom. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one Y3+ and one Mo6+ atom. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one Hf4+ and one Mo6+ atom. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to one Y3+ and one Mo6+ atom. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Hf4+ and one Mo6+ atom. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Y3+ and one Mo6+ atom. In the twelfth O2- site, O2- is bonded in a distorted linear geometry to one Y3+ and one Mo6+ atom. In the thirteenth O2- site, O2- is bonded in a distorted linear geometry to one Y3+ and one Mo6+ atom. In the fourteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Hf4+ and one Mo6+ atom.

• Research Organization: LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Contributing Organization: The Materials Project; MIT; UC Berkeley; Duke; U Louvain
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1749427
• Report Number(s): mp-1207897
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Hf-Mo-O-Y
Y2Hf2(MoO4)7
crystal structure