Materials Data on Na2HgO2 by Materials Project
Na2HgO2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Na1+ is bonded to five equivalent O2- atoms to form a mixture of corner and edge-sharing NaO5 square pyramids. There are one shorter (2.36 Å) and four longer (2.48 Å) Na–O bond lengths. Hg2+ is bonded in a linear geometry to two equivalent O2- atoms. Both Hg–O bond lengths are 2.01 Å. O2- is bonded to five equivalent Na1+ and one Hg2+ atom to form a mixture of corner and edge-sharing ONa5Hg octahedra. The corner-sharing octahedra tilt angles range from 0–17°.
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