PbS crystallizes in the orthorhombic Aem2 space group. The structure is two-dimensional and consists of one PbS sheet oriented in the (0, 0, 1) direction. Pb2+ is bonded to five equivalent S2- atoms to form a mixture of edge and corner-sharing PbS5 square pyramids. There are a spread of Pb–S bond distances ranging from 2.70–3.10 Å. S2- is bonded in a single-bond geometry to five equivalent Pb2+ atoms.
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