On the atomic scattering factor for O<sup>2−</sup>

Hovestreydt, E.

doi:10.1107/s0108767383000550

Cited by 82 publications

(42 citation statements)

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“…The subsequent re"nements were carried out with the SHELXL-93 program (12). X-ray scattering factors for the di!erent cations in their respective valence state, together with real and imaginary anomalousdispersion coe$cients, were taken from the &&International Tables for X-ray Crystallography'' (13); the values for O\ were taken from Hovestreydt (14). Each of the "nal leastsquares calculations using anisotropic displacement parameters converged to R1"0.034 for 128 parameters for all independent re#ections (cf.…”

Section: Structure Solution and Rexnementmentioning

confidence: 99%

Polymorphism of Strontium Monogallate: The Framework Structures of β-SrGa2O4 and ABW-Type γ-SrGa2O4

Kahlenberg

Fischer

Shaw

2000

Journal of Solid State Chemistry

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Section: Structure Solution and Rexnementmentioning

confidence: 99%

Polymorphism of Strontium Monogallate: The Framework Structures of β-SrGa2O4 and ABW-Type γ-SrGa2O4

Kahlenberg

Fischer

Shaw

2000

Journal of Solid State Chemistry

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“…The atomic form factors f j are based on the tabulated Cromer-Mann coefficients 23,24 and the real and imaginary part of the dispersion correction. 25 The calculations take into account the differences between Mn 3+ and Mn 4+ ions.…”

Section: A Simple Displacive Excitation Modelmentioning

confidence: 99%

Identification of coherent lattice modulations coupled to charge and orbital order in a manganite

et al. 2013

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We apply grazing-incidence femtosecond x-ray diffraction to investigate the details of the atomic motion connected with a displacively excited coherent optical phonon. We concentrate on the low frequency phonon associated with the charge and orbital order in the mixed valence manganite La0.25Pr0.375Ca0.375MnO3 for T < ∼ 210 K. We measure the response of three superlattice reflections that feature different sensitivities to the motion of the unit cell constituents. The results support the assignment to a translational mode of the Mn 4+ atoms together with the oxygen atoms connecting adjacent Mn 4+ sites.

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“…, and Si were obtained from the International Tables for Crystallography, vol. C (Prince, 1992), and the scattering factors for O 2− were taken from Hovestreydt (1983). With the exception of Si, the ionic scattering factors were applied because the refined Fe 3+ /Al ratio showed the best agreement with the chemical compositions determined by the EPMA analysis.…”

Section: Single-crystal X-ray Diffraction Experimentsmentioning

confidence: 99%

Cation ordering of {110} and {211} sectors in grandite garnet from Mali

Nakamura

Kuribayashi

Nagase

2016

Journal of Mineralogical and Petrological Sciences

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The cation ordering of the {110} c and {211} c growth sectors in birefringent garnet from Kayas, Mali was investigated by means of single-crystal X-ray diffraction (SC-XRD) 3d were observed, and crystal structure models for both the {110} c and {211} c sectors should have triclinic symmetry with the space group I 1. The unit-cell parameters of both growth sectors were a = 11.9739(13), b = 11.9742(14), c = 11.9737(13) Å, α = 90.001(9), β = 90.098(9) and γ = 90.014 (10)°for the {110} c sector; a = 11.952(6), b = 11.952(6), c = 11.957(6) Å, α = 90.06(4), β = 90.01(4) and γ = 89.94(4)°for the {211} c sector. Structure refinements for I 1 models of both sectors were convergent with R1 = 3.02 and 3.36%, respectively. There were significant differences in the Fe 3+ occupancies in the Y sites of the {211} c sector were random and different from that of the {110} c sector. Different cation distributions between the growth sectors in the Mali garnet indicate that cation ordering in the crystal structure was formed during growth. These observations suggest that the differences in the Fe 3+ distribution between the {110} c and {211} c sectors are strongly affected by the growth process in each sector.

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On the atomic scattering factor for O²⁻

Cited by 82 publications

References 0 publications

Polymorphism of Strontium Monogallate: The Framework Structures of β-SrGa2O4 and ABW-Type γ-SrGa2O4

Polymorphism of Strontium Monogallate: The Framework Structures of β-SrGa2O4 and ABW-Type γ-SrGa2O4

Identification of coherent lattice modulations coupled to charge and orbital order in a manganite

Cation ordering of {110} and {211} sectors in grandite garnet from Mali

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On the atomic scattering factor for O2−

Cited by 82 publications

References 0 publications

Polymorphism of Strontium Monogallate: The Framework Structures of β-SrGa2O4 and ABW-Type γ-SrGa2O4

Polymorphism of Strontium Monogallate: The Framework Structures of β-SrGa2O4 and ABW-Type γ-SrGa2O4

Identification of coherent lattice modulations coupled to charge and orbital order in a manganite

Cation ordering of {110} and {211} sectors in grandite garnet from Mali

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On the atomic scattering factor for O²⁻