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
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Nitrogen donor chelates of bivalent tin chloride. Part II. The crystal structures of SnCl2·(2,2′-bipyridyl) and SnCl2·(1,10-phenanthroline)
TL;DR: The crystal and molecular structures of dichloro- (2,2′-bipyridyl)tin(II), dichlorobis(8-hydroxyquinolinato) tin(IV) have been determined by means of single crystal X-ray diffraction as mentioned in this paper.
Journal ArticleDOI
Third order nonlinear optical and electrical properties of new 2-aminopyridinium 2-chloro 4-nitrobenzoate single crystals
Journal ArticleDOI
Three-dimensional structure at 5 A resolution of cytosolic aspartate transaminase from chicken heart.
V.V. Borisov,Borisova Sn,Galina S. Kachalova,N.I. Sosfenov,B. K. Vainshtein,Yu.M. Torchinsky,A.E. Braunstein +6 more
TL;DR: An X-ray study of orthorhombic crystals of cytosolic aspartate transaminase from chicken heart carried out at 5 A resolution revealed clearly two subunits of similar structure related by a non-crystallographic dyad.
Journal ArticleDOI
Dipyrimidine-copper(II) dinitrate complexes showing magnetic interactions.
Masanori Yasui,Yoshimitsu Ishikawa,Naoya Akiyama,Takayuki Ishida,Takashi Nogami,Fujiko Iwasaki +5 more
TL;DR: Magnetic measurements of (1) and (2) show that they are good examples of uniform S = 1/2 ferro- and antiferromagnetic Heisenberg chains with exchange parameters 2J/kB = +1.8 and -36 K, respectively.
Journal ArticleDOI
Polymeric and tetranuclear silver(I) chains encapsulated by a scorpion-like ligand. Synthesis and structures of [Ag2(tren(mim)3)]n(NO3)2n·nH2O and [Ag4(tren(mim)3)2](CF3SO3)4·2H2O (tren(mim)3=tris{2-[2-(1-methyl)imidazolyl]methyliminoethyl}amine)
TL;DR: In this paper, two ligands encapsulate four Ag(I) atoms in an interlocking fashion and a pair of the tetranuclear cations related by an inversion center is connected to form an octanuclear cation through a ligand-unsupported metallic interaction between two AgI atoms being separated at 3.117(2) A.
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.