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
Metal chelates of N-(2-pyridylmethyl)iminodiacetate(2-) ion (pmda). Part I. Two mixed-ligand copper(II) complexes of pmda with N,N-chelating bases. Synthesis, crystal structure and properties of H2pmda·0.5H2O, [Cu(pmda)(pca)]·3H2O (pca=α-picolylamine) and [Cu(pmda)(Hpb)]·5H2O (Hpb=2-(2′-pyridyl)benzimidazole)
Duane Choquesillo-Lazarte,Berta Covelo,Josefa María González-Pérez,Alfonso Castiñeiras,Juan Niclós-Gutiérrez +4 more
TL;DR: In this article, a 2-Pyridylmethyliminodiacetic acid hemi-hydrate (H2pmda/0.5H2O) was prepared and characterized by X-ray crystallography (final R 1 � /0.042).
Journal ArticleDOI
Discontinuum between a thiolate and a thiol ligand.
TL;DR: H-bonding has a continuous effect on the donor properties of the thiolate ligand of 1, which indicates the HOMO of 1 is Fedpi-Sppi antibonding and largely sulfur in character.
Journal ArticleDOI
Crystal structure and magnetic properties of a new three-dimensional coordination polymer constructed from (4,4) layers based on dimeric iron(II) subunits
TL;DR: In this article, a metal-organic polymer (Fe(pydc)(H2O), called 1, has been hydrothermally synthesized and characterised by X-ray diffraction, showing that 1 is a threedimensional framework featuring two-dimensional carboxylate-bridged layers based on canted dimeric iron(II) subunits.
Journal ArticleDOI
Crystal field spectra and Jahn Teller effect of Mn3+ in clinopyroxene and clinoamphiboles from India
TL;DR: Blanfordite (I), winchite (II), and juddite (III), all showing vivid colors and pleochroism, from highly oxidized parageneses of Indian gondites were studied by microprobe, Mossbauer, and microscope-spectrophotometric techniques and by X-ray structure refinements as discussed by the authors.
Journal ArticleDOI
Carbohydrate Binding to VO3+. Sugar Vanadate Esters Incorporating l-Amino Acid Schiff Bases as Coligands†
TL;DR: The glycoside glycosides methyl-2,6-dimethoxy-beta-D-galactopyranoside, methyl-4, 6-dimETHoxy-alpha- D-mannopyrside, and methyl-5-methoxidic oxygen atom are synthesized and the chiral configuration of the metal site corresponds exclusively to the endo disposition of the V=O and the amino acid C-R bonds.
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.