Synthesis and crystal structural characterization of a new lead oxide chromate phosphate: Pb5O(CrO4)(PO4)2

Mao, Shao‐Yu; Mao, Yanping; Zhong, Mei‐Ping; Ye, Zuo‐Guang

doi:10.1016/j.jallcom.2008.04.069

Cited by 4 publications

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“…In contrast, only a few examples of complex lead and chromium compounds with phosphate groups are known so far, for example, Pb 3 Cr 2 (PO 4 ) 4 , 7 Pb 4 (PO 4 ) 2 CrO 4 8 and Pb 5 O (CrO 4 )(PO 4 ) 2 9 phosphates. They all contain lead and chromium cations and PO 4 3À groups, but the polyhedra formed by Cr and O are different: in Pb 3 Cr 2 (PO 4 ) 4 , they form CrO 6 octahedra, but in Pb 4 (PO 4 ) 2 CrO 4 and Pb 5 O(CrO 4 )(PO 4 ) 2 , they form CrO 4 tetrahedra.…”

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confidence: 99%

Polymorphic structures and properties of lead chromium phosphate Pb3Cr2(PO4)4

Mao

Batchelor

et al. 2009

J. Mater. Chem.

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Single crystals of lead chromium phosphate Pb 3 Cr 2 (PO 4 ) 4 were grown by a flux technique and characterized by X-ray powder and single crystal diffraction, differential thermal analysis, polarized light microscopy and magnetic measurements. Two polymorphic structures have been identified: a monoclinic Pb 3 Cr 2 (PO 4 ) 4 of space group P2 1 /c ( 14) and a tetragonal Pb 3 Cr 2 (PO 4 ) 4 of space group P4 1 2 1 2 (94), and their phase correlation is described. Both structures consist of a three-dimensional framework which is composed of PO 4 tetrahedra and CrO 6 octahedra connected via vertices. Lead ions are situated at the cavities of the framework, but the positions of lead ions in the monoclinic Pb 3 Cr 2 (PO 4 ) 4 are different from those in the tetragonal Pb 3 Cr 2 (PO 4 ) 4 . The Pb 3 Cr 2 (PO 4 ) 4 crystals are found to exhibit interesting physical properties. The ferroelastic domain structures reveal characteristic patterns of the tetragonal and the monoclinic symmetry of the crystals. The birefringence of the tetragonal crystals decreases with increasing temperature. The monoclinic crystal is found to undergo a series of magnetic phase transitions upon cooling, from a paramagnetic phase (from room temperature down), to an antiferromagnetic phase below T N ¼ 6 K, and then to a weakly ferromagnetic phase below the Curie temperature T C ¼ 4 K, with a magnetic hysteresis loop displayed at 2 K.

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Section: Introductionmentioning

confidence: 99%

Polymorphic structures and properties of lead chromium phosphate Pb3Cr2(PO4)4

Mao

Batchelor

et al. 2009

J. Mater. Chem.

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ChemInform Abstract: Synthesis and Crystal Structural Characterization of a New Lead Oxide Chromate Phosphate: Pb₅O(CrO₄)(PO₄)₂.

Mao

Zhong

et al. 2009

ChemInform

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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.;

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A semiconducting gyroidal metal-sulfur framework for chemiresistive sensing

Huang

Yao

et al. 2017

J. Mater. Chem. A

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Synthesis and crystal structural characterization of a new lead oxide chromate phosphate: Pb5O(CrO4)(PO4)2

Cited by 4 publications

References 10 publications

Polymorphic structures and properties of lead chromium phosphate Pb3Cr2(PO4)4

Polymorphic structures and properties of lead chromium phosphate Pb3Cr2(PO4)4

ChemInform Abstract: Synthesis and Crystal Structural Characterization of a New Lead Oxide Chromate Phosphate: Pb₅O(CrO₄)(PO₄)₂.

A semiconducting gyroidal metal-sulfur framework for chemiresistive sensing

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Synthesis and crystal structural characterization of a new lead oxide chromate phosphate: Pb5O(CrO4)(PO4)2

Cited by 4 publications

References 10 publications

Polymorphic structures and properties of lead chromium phosphate Pb3Cr2(PO4)4

Polymorphic structures and properties of lead chromium phosphate Pb3Cr2(PO4)4

ChemInform Abstract: Synthesis and Crystal Structural Characterization of a New Lead Oxide Chromate Phosphate: Pb5O(CrO4)(PO4)2.

A semiconducting gyroidal metal-sulfur framework for chemiresistive sensing

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About

ChemInform Abstract: Synthesis and Crystal Structural Characterization of a New Lead Oxide Chromate Phosphate: Pb₅O(CrO₄)(PO₄)₂.