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NaAgCd2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two NaAgCd2 ribbons oriented in the (1, 0, 0) direction. Na is bonded in a linear geometry to two equivalent Cd atoms. Both Na–Cd bond lengths are 3.07 Å. Ag is bonded in a linear geometry to two equivalent Cd atoms. Both Ag–Cd bond lengths are 2.79 Å. Cd is bonded in a linear geometry to one Na and one Ag atom.
NaAgCd2 is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Na is bonded in a distorted body-centered cubic geometry to six equivalent Ag and eight equivalent Cd atoms. All Na–Ag bond lengths are 3.52 Å. All Na–Cd bond lengths are 3.05 Å. Ag is bonded in a 8-coordinate geometry to six equivalent Na and eight equivalent Cd atoms. All Ag–Cd bond lengths are 3.05 Å. Cd is bonded in a body-centered cubic geometry to four equivalent Na and four equivalent Ag atoms.