Materials Data on RbAlSiO4 by Materials Project

Abstract

RbAlSiO4 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. Rb1+ is bonded in a 2-coordinate geometry to eight O2- atoms. There are a spread of Rb–O bond distances ranging from 2.95–3.45 Å. Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with four equivalent SiO4 tetrahedra. There are a spread of Al–O bond distances ranging from 1.74–1.78 Å. Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four equivalent AlO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Rb1+, one Al3+, and one Si4+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Rb1+, one Al3+, and one Si4+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Rb1+, one Al3+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a linear geometry to two equivalent Rb1+, one Al3+, and one Si4+ atom.