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Lead I 4900 Synthesis and Crystal Structural Characterization of a New Lead Oxide Chromate Phosphate: Pb 5 O(CrO 4 )(PO 4 ) 2 . -Orange single crystals of the new title compound are prepared by a self-flux technique from a mixture of PbO, CrO2, NH4H2PO4, and H3BO3 powders (Pt crucible1170°C, 24 h). The compound crystallizes in the orthorhombic space group Pcmn with Z = 4. The crystal structure contains strictly alternating CrO4 and PO4 tetrahedra linking four crystallographically different Pb atoms with Pb coordination numbers range from four to seven atoms. The multiple crystallographic sites and the rich coordination environment of Pb in a single compound appear to be unusual. -(MAO*, S.-Y.; MAO, Y.-P.; ZHONG, M.-P.; YE, Z.-G.;