Monoxyde quadratique PbOα(I): Description de la transition structurale ferroe´lastique

Boher, Pierre; Garnier, P.; Gavarri, J.R.; Hewat, A.W.

doi:10.1016/0022-4596(85)90197-5

Cited by 98 publications

(51 citation statements)

References 10 publications

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“…Let us suppose that the oxygen vacancies are disordered in the real PbO, structure. Lead CV in PbO, crystals becomes equal to four, if x is equal to 1.78 (this result correlates satisfactorily with the experimental estimation of PbO, composition [ 11).…”

Section: Crystal Structure Of the Lead Oxidessupporting

confidence: 81%

The Electronic Structure of Crystalline Lead Oxides. I. Crystal Structure and LUC‐CNDO Calculations

Ėvarestov

Veryazov

1991

Physica Status Solidi (b)

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Section: Crystal Structure Of the Lead Oxidessupporting

confidence: 81%

The Electronic Structure of Crystalline Lead Oxides. I. Crystal Structure and LUC‐CNDO Calculations

Ėvarestov

Veryazov

1991

Physica Status Solidi (b)

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“…In Figure 5, for clarity, the Ba 4 Ga 5 Pn 8 formula is broken down to two hypothetical fragments with familiar bonding: (1) Ba 4 GaPn 4 , which is isotypic with Ba 4 SiAs 4 , [40] and (2) GaPn with a PbO-like pattern. [41] All Ga-P and Ga-As distances refined from the well-behaved segments of the structure compare very well with the distances in CaGa 2 P 2 , CaGa 2 As 2 , SrGa 2 As 2 , BaGa 2 As 2 , and BaGa 2 P 2 . [24] Interestingly, the structures are devoid of Ba disorder, and all Ba-P and Ba-As distances, including those to partially occupied atoms, are on par with the sum of the corresponding elemental radii.…”

Section: +mentioning

confidence: 50%

Gallium Pnictides of the Alkaline Earth Metals, Synthesized by Means of the Flux Method: Crystal Structures and Properties of CaGa₂Pn₂, SrGa₂As₂, Ba₂Ga₅As₅, and Ba₄Ga₅Pn₈ (Pn = P or As)

Stearrett

Nowak

et al. 2011

Eur J Inorg Chem

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Keywords: Alkaline earth metals / Gallium / Pnictides / Solid-state structures / Density functional calculationsThe focus of this paper is on the structural characterization of the new Zintl phases CaGa 2 P 2 , CaGa 2 As 2 , SrGa 2 As 2 , and Ba 2 Ga 5 As 5 , and the solid solution (Ba 0.85(1) Sr 0.15 ) 2 Ga 5 As 5 , all of which were synthesized from molten metal fluxes. CaGa 2 P 2 , CaGa 2 As 2 , and SrGa 2 As 2 have layered structures with polyanionic layers made of ethane-like Ga 2 P 6 and Ga 2 As 6 motifs fused through common edges; the polyanionic substructure in Ba 2 Ga 5 As 5 consists of condensed Ga 2 As 6 units and GaAs 4 tetrahedra. Ba 4 Ga 5 P 8 and Ba 4 Ga 5 As 8 , another pair of new compounds with channel-like 3D structures, were also synthesized from metal fluxes, and their

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“…It differs in symmetry from that of the low-temperature Cmca (incommensurate) phase [27] of tetragonal PbO. To get an idea of the magnitude of the distortion in SnO, we have refined the diffraction pattern of SnO at 17.5 GPa shown in Fig.…”

Section: Crystal Structure Under Pressurementioning

confidence: 99%

Structural properties, infrared reflectivity, and Raman modes of SnO at high pressure

Wang

Zhang

Loa

et al. 2004

Physica Status Solidi (b)

103

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We have investigated the high-pressure behavior of the 'lone-pair' compound SnO using monochromatic synchrotron X-ray diffraction, synchrotron far-and mid-infrared reflection measurements, and Raman spectroscopy. The litharge-type ambient pressure structure is observed up to at least 20 GPa, though with indications for a small distortion above 15 GPa. Changes in interatomic distances are determined via full Rietveld refinements of diffraction patterns. SnO is found to undergo a semiconductor to metal transition near 5(1) GPa; the transition is attributed to the closure of the indirect fundamental gap. The mode Grüneisen parameters of zone-center Raman mode frequencies are reported. The results are discussed in light of related experimental and theoretical studies of structural, dynamical, and electronic properties of SnO.

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Monoxyde quadratique PbOα(I): Description de la transition structurale ferroe´lastique

Cited by 98 publications

References 10 publications

The Electronic Structure of Crystalline Lead Oxides. I. Crystal Structure and LUC‐CNDO Calculations

The Electronic Structure of Crystalline Lead Oxides. I. Crystal Structure and LUC‐CNDO Calculations

Gallium Pnictides of the Alkaline Earth Metals, Synthesized by Means of the Flux Method: Crystal Structures and Properties of CaGa₂Pn₂, SrGa₂As₂, Ba₂Ga₅As₅, and Ba₄Ga₅Pn₈ (Pn = P or As)

Structural properties, infrared reflectivity, and Raman modes of SnO at high pressure

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Monoxyde quadratique PbOα(I): Description de la transition structurale ferroe´lastique

Cited by 98 publications

References 10 publications

The Electronic Structure of Crystalline Lead Oxides. I. Crystal Structure and LUC‐CNDO Calculations

The Electronic Structure of Crystalline Lead Oxides. I. Crystal Structure and LUC‐CNDO Calculations

Gallium Pnictides of the Alkaline Earth Metals, Synthesized by Means of the Flux Method: Crystal Structures and Properties of CaGa2Pn2, SrGa2As2, Ba2Ga5As5, and Ba4Ga5Pn8 (Pn = P or As)

Structural properties, infrared reflectivity, and Raman modes of SnO at high pressure

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Gallium Pnictides of the Alkaline Earth Metals, Synthesized by Means of the Flux Method: Crystal Structures and Properties of CaGa₂Pn₂, SrGa₂As₂, Ba₂Ga₅As₅, and Ba₄Ga₅Pn₈ (Pn = P or As)