Structure of dichromate-type lead pyrophosphate, Pb2P2O7

Mullica, D. F.; Perkins, H. O.; Grossie, David A.; Boatner, L. A.; Sales, B. C.

doi:10.1016/0022-4596(86)90252-5

Cited by 51 publications

(26 citation statements)

References 17 publications

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“…Mullica and co-workers [16] have reported the crystal structural analysis of Pb 2 P 2 O 7 compound. The structure contains sheets of P 2 O 7 groups parallel to (110) planes with an eclipsed conformation as shown in Fig.…”

Section: Crystalline Parametersmentioning

confidence: 99%

“…As a continuation of that work, synthesis and impedance studies of Pb 2 P 2 O 7 were presented and discussed in this paper. The structural analysis of Pb 2 P 2 O 7 were first reported by Brixner et al [19] and later refined by Mullica and co-workers [16]. However, the impedance spectroscopic analysis studies of this compound have yet been reported.…”

Section: Introductionmentioning

confidence: 96%

“…the dichromate structure type and the thortveitite structure type. When radius of B 2+ is smaller than 0.97Å [B=Mg (0.72), Mn (0.83), Co (0.745), Ni (0.69), Cu (0.73), Fe (0.78), and Zn (0.74)], B II P 2 O 7 crystallizes in the thortveitite-type structure [2][3][4][5][6][7][8][9][10][11][12][13][14], and when the radius of B 2+ is larger than 0.97Å [B=Sr (1.18), Ba (1.35), Ca (1), and Pb (1.19)], the structure is of the dichromate type [15,16]. The difference between these two structures depends on the P-O-P angle configuration of P 2 O 7 group.…”

Section: Introductionmentioning

confidence: 99%

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Impedance spectroscopy study of Pb2P2O7 compound

Mahamoud

Louati

Hlel

et al. 2011

Ionics

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The lead pyrophosphate, Pb 2 P 2 O 7 , compound was prepared by conventional solid-state reaction and identified by X-ray powder diffractometer. Pb 2 P 2 O 7 has a triclinic structure whose electrical properties were studied using impedance spectroscopy technique. Both impedance and modulus analysis exhibit the grain and grain boundary contribution to the electrical response of the sample. The temperature dependence of the bulk and grain boundary conductivity were found to obey the Arrhenius law with activation energies E g =0.66 eV and E gb =0.67 eV, respectively. The scaling behavior of the imaginary part of the complex impedance suggests that the relaxation describes the same mechanism at various temperatures.

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Section: Crystalline Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Impedance spectroscopy study of Pb2P2O7 compound

Mahamoud

Louati

Hlel

et al. 2011

Ionics

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“…The largest of these was ϳ0.17 Ry/ a 0 on the O͑5͒ atom and ϳ0.15 Ry/ a 0 on the P͑2͒ atom, using the notation of Ref. 6. These forces are larger than those normally found in LDA calculations for non-transition-element-containing oxides with experimental crystal structures.…”

mentioning

confidence: 71%

“…The lattice parameters were held fixed at their experimental values a = 6.941 Å, b = 6.966 Å, c = 12.751 Å, ␣ = 96.82°, ␤ = 91.14°, and ␥ = 89.64°and triclinic P1 spacegroup, as determined by Mullica and co-workers. 6 These are obtained experimentally from the positions of the Bragg peaks and are no doubt much more accurate than values that can be obtained from LDA calculations. The structure relaxation was done using the general potential linearized augmented plane-wave ͑LAPW͒ method, with local orbital extensions.…”

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confidence: 88%

Density functional calculations and analysis of the crystal structure ofPb2P2O7

2007

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Density functional calculations of the atomic coordinates in crsytalline lead pyrophosphate ͑Pb 2 P 2 O 7 ͒ are reported. These calculations yield atomic positions differing from a prior x-ray refinement by up to 0.2 Å. The main difference is a change in the orientation of the ͑P 2 O 7 ͒ 4− units to bring certain O ions closer to Pb. An analysis of the resulting structure in terms of pair distribution functions is presented. These show that the most significant changes are in the local Pb coordination. The electronic structure is not significantly affected by the change in crystal structure.

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A New Cadmium‐Based Pb₂Cd₃(PO₄)₂(P₂O₇) with Two Types of Isolated P–O Groups

et al. 2019

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Introduction transition metal with d 10 electrons and lone pair cations with large radius into phosphate systems are helpful to get new crystal structure configuration. Guided by the above method, the first lead cadmium phosphate, Pb 2 Cd 3 (PO 4 ) 2 (P 2 O 7 ), was synthesized. Pb 2 Cd 3 (PO 4 ) 2 (P 2 O 7 ) features a three-dimensional (3D) structure, in which Pb (1) 2 O 8 dimer and Pb(2)O 5 polyhedra are filled between the twodimensional (2D) layers, which are composed of unique [Cd 6 P 8 O 30 ] groups. In the Pb II M II PO (M II = without or divalent [a] Physical and

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Structure of dichromate-type lead pyrophosphate, Pb2P2O7

Cited by 51 publications

References 17 publications

Impedance spectroscopy study of Pb2P2O7 compound

Impedance spectroscopy study of Pb2P2O7 compound

Density functional calculations and analysis of the crystal structure ofPb2P2O7

A New Cadmium‐Based Pb₂Cd₃(PO₄)₂(P₂O₇) with Two Types of Isolated P–O Groups

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Structure of dichromate-type lead pyrophosphate, Pb2P2O7

Cited by 51 publications

References 17 publications

Impedance spectroscopy study of Pb2P2O7 compound

Impedance spectroscopy study of Pb2P2O7 compound

Density functional calculations and analysis of the crystal structure ofPb2P2O7

A New Cadmium‐Based Pb2Cd3(PO4)2(P2O7) with Two Types of Isolated P–O Groups

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Product

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A New Cadmium‐Based Pb₂Cd₃(PO₄)₂(P₂O₇) with Two Types of Isolated P–O Groups