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RbTe crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. Rb1+ is bonded in a 8-coordinate geometry to eight equivalent Te1- atoms. There are a spread of Rb–Te bond distances ranging from 3.73–4.07 Å. Te1- is bonded in a 9-coordinate geometry to eight equivalent Rb1+ and one Te1- atom. The Te–Te bond length is 2.86 Å.
RbTe crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 6-coordinate geometry to six Te1- atoms. There are two shorter (3.78 Å) and four longer (3.82 Å) Rb–Te bond lengths. In the second Rb1+ site, Rb1+ is bonded in a 6-coordinate geometry to six Te1- atoms. There are four shorter (3.72 Å) and two longer (3.76 Å) Rb–Te bond lengths. There are two inequivalent Te1- sites. In the first Te1- site, Te1- is bonded in a 8-coordinate geometry to six Rb1+ and one Te1- atom. The Te–Te bond length is 2.84 Å. In the second Te1- site, Te1- is bonded in a 8-coordinate geometry to six Rb1+ and one Te1- atom. The Te–Te bond length is 2.82 Å.
RbTe is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Rb1+ is bonded to six equivalent Te1- atoms to form a mixture of corner and edge-sharing RbTe6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Rb–Te bond lengths are 3.74 Å. Te1- is bonded to six equivalent Rb1+ atoms to form a mixture of corner and edge-sharing TeRb6 octahedra. The corner-sharing octahedral tilt angles are 0°.
RbTe is Zincblende, Sphalerite structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Rb1+ is bonded to four equivalent Te1- atoms to form corner-sharing RbTe4 tetrahedra. All Rb–Te bond lengths are 3.64 Å. Te1- is bonded to four equivalent Rb1+ atoms to form corner-sharing TeRb4 tetrahedra.