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RhSn2 is Khatyrkite-like structured and crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. Rh is bonded in a 10-coordinate geometry to eight equivalent Sn atoms. All Rh–Sn bond lengths are 2.83 Å. Sn is bonded in a 4-coordinate geometry to four equivalent Rh atoms.
NdRh2Sn4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Nd is bonded in a 6-coordinate geometry to seven Sn atoms. There are a spread of Nd–Sn bond distances ranging from 3.20–3.38 Å. There are two inequivalent Rh sites. In the first Rh site, Rh is bonded in a 7-coordinate geometry to seven Sn atoms. There are a spread of Rh–Sn bond distances ranging from 2.73–2.84 Å. In the second Rh site, Rh is bonded in a 7-coordinate geometry to seven Sn atoms. There are a spread of Rh–Sn bond distances ranging from 2.71–2.89 Å. There are four inequivalent Sn sites. In the first Sn site, Sn is bonded in a 5-coordinate geometry to two equivalent Nd and three equivalent Rh atoms. In the second Sn site, Sn is bonded to four Rh atoms to form a mixture of distorted edge and corner-sharing SnRh4 tetrahedra. In the third Sn site, Sn is bonded in a 6-coordinate geometry to two equivalent Nd and four Rh atoms. In the fourth Sn site, Sn is bonded in a 3-coordinate geometry to three equivalent Nd and three equivalent Rh atoms.
RhSn2 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. Rh is bonded in a 8-coordinate geometry to eight Sn atoms. There are two shorter (2.79 Å) and six longer (2.81 Å) Rh–Sn bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 4-coordinate geometry to four equivalent Rh atoms. In the second Sn site, Sn is bonded to four equivalent Rh atoms to form a mixture of edge and corner-sharing SnRh4 tetrahedra.