Materials Data on Rb(FeAs)2 by Materials Project
RbFe2As2 is alpha bismuth trifluoride-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Rb1+ is bonded in a body-centered cubic geometry to eight equivalent As3- atoms. All Rb–As bond lengths are 3.46 Å. Fe+2.50+ is bonded to four equivalent As3- atoms to form a mixture of edge and corner-sharing FeAs4 tetrahedra. All Fe–As bond lengths are 2.34 Å. As3- is bonded in a 8-coordinate geometry to four equivalent Rb1+ and four equivalent Fe+2.50+ atoms.
36 MATERIALS SCIENCE↗