Journal ArticleDOI
A semi-empirical method of absorption correction
TLDR
An extension of Furnas's method is described in this paper, where the variation of intensity of an axial reflection as the crystal is rotated about the goniometer axis is used to give a curve of relative transmission T against azimuthal angle ϕ for the corresponding reciprocal lattice level.Abstract:
An extension of Furnas's method is described. The variation of intensity of an axial reflection as the crystal is rotated about the goniometer axis is used to give a curve of relative transmission T against azimuthal angle ϕ for the corresponding reciprocal lattice level. Transmission coefficients for any general reflexion hkl are then given approximately by T(hkl) = [T(ϕinc) + T(ϕret)]/2 where ϕinc and ϕret are the azimuthal angles of the incident and reflected beams. Equations are derived for (ϕinc and ϕret and the accuracy of the method is discussed.read more
Citations
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Journal ArticleDOI
Modern X-ray Diffraction Methods in Mineralogy and Geosciences
TL;DR: X-ray diffraction has become a commonly used technique for the identification and characterization of materials and the field has seen continuous development as discussed by the authors, which has led to a wide range of applications in geoscience.
Journal ArticleDOI
X-ray Diffraction and 1H NMR in Solution: Structural Determination of Lanthanide Complexes of a Py2N6Ac4 Ligand
Laura Valencia,Jesús Martínez,Alejandro Macías,Rufina Bastida,R. A. Carvalho,Carlos F. G. C. Geraldes +5 more
TL;DR: In this paper, the Py2N6Ac4 (H4L) ligand with four carboxylate pendant arms and trivalent lanthanide ions has been synthesized, and structural studies have been made both in the solid state and aqueous solution.
Journal ArticleDOI
Conjugated Thiophene-Fused Isatin Dyes through Intramolecular Direct Arylation.
TL;DR: The design, synthesis, and properties of innovative, planar, π-conjugated compounds in which a thiophene ring is fused with the skeleton of the naturally occurring dye isatin are reported, making these novel dyes with a donor-acceptor character.
Journal ArticleDOI
Optical properties of the germanate melilites Sr2MgGe2O7, Sr2ZnGe2O7 and Ba2ZnGe2O7
TL;DR: In this paper, a detailed analysis of phase matching conditions for phase matched second harmonic generation is given. But the results corroborate unmodulated melilite-type structures at room temperature.
Journal ArticleDOI
Chemistry of hydrazonato oxovanadium(V) alkoxides derived from dihydric/monohydric alcohols
TL;DR: In this paper, the X-ray structures of VO(babh)(Hed) and VO(sabah)(OMe)(OHMe) were reported, and the general VO bond length order is oxo E 1 2, − 0.3 to −0.2 V ) corresponding to stabilization of the pentavalent state.
References
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Book
International tables for X-ray crystallography
Norman Fordyce McKerron Henry,Lonsdale, Kathleen, Dame,John S. Kasper,Caroline H. MacGillavry,Gerard D. Rieck,James A. Ibers,Walter C. Hamilton +6 more
ReportDOI
A fortran program for calculating single crystal absorption corrections
D.J. Wehe,W.R. Busing,H.A. Levy +2 more
TL;DR: A Fortran program is described for calculating the absorption correction for application to single crystal x ray or neutron intensity measurements and is available in the form of symbolic punched cards.