Materials Data on Rb2Mg2(WO4)3 by Materials Project

Dataset · Sat May 02 04:00:00 EDT 2020

DOI:https://doi.org/10.17188/1696092· OSTI ID:1696092

Rb2Mg2(WO4)3 crystallizes in the cubic P2_13 space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 3-coordinate geometry to three equivalent O2- atoms. All Rb–O bond lengths are 3.13 Å. In the second Rb1+ site, Rb1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Rb–O bond distances ranging from 3.22–3.30 Å. There are two inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six equivalent WO4 tetrahedra. There are three shorter (2.10 Å) and three longer (2.11 Å) Mg–O bond lengths. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six equivalent WO4 tetrahedra. There are three shorter (2.09 Å) and three longer (2.10 Å) Mg–O bond lengths. W6+ is bonded to four O2- atoms to form WO4 tetrahedra that share corners with four MgO6 octahedra. The corner-sharing octahedra tilt angles range from 12–48°. There is two shorter (1.81 Å) and two longer (1.82 Å) W–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Rb1+, one Mg2+, and one W6+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Rb1+, one Mg2+, and one W6+ atom. In the third O2- site, O2- is bonded in a distorted linear geometry to one Rb1+, one Mg2+, and one W6+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Rb1+, one Mg2+, and one W6+ 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: 1696092
• Report Number(s): mp-1195026
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Mg-O-Rb-W
Rb2Mg2(WO4)3
crystal structure