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  • 1
    Electronic Resource
    Electronic Resource
    Crystallization of hemoglobins II and III of the symbiont-harboring clam Lucina pectinata (1994)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 50 (1994), S. 757-759 
    Details
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Diffraction data to 2.7 Å resolution were measured on crystals of the homotetramers of components II and III of the cytoplasmic hemoglobin of the symbiont-harboring clam Lucina pectinata. Even though the crystallization conditions are different and the sequence homology of the two hemoglobins is only 63%, the crystals are isomorphous to each other and to the heterotetramer Hb II/III, implying that the residues primarily involved in the intermolecular interactions and responsible for crystal cohesion may be invariant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0907444994002556
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  • 2
    Electronic Resource
    Electronic Resource
    Absorption coefficients for Al 111 systematics: theory and comparison with experiment (1970)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 26 (1970), S. 133-139 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Simple physical models are taken to calculate thermal and electronic contributions to absorption coefficients in Al. N-beam systematic calculations are interpreted by means of 2-beam theory, making possible a comparison with the experimental values of Watanabe. The mean absorption coefficient agrees to within 25 per cent. Spherical aberration and thermal diffuse scattering within the objective aperture are shown to explain the poorer agreement for the anomalous absorption coefficient. It is concluded that weak beams are significant in the measurement of absorption coefficients. Weak systematic beams are shown to have a significant effect on the positions of the thickness fringe maxima. A brief comparison of 2- and N-beam rocking curves is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739470000190
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  • 3
    Electronic Resource
    Electronic Resource
    The refinement of the crystal structure of norbornadiene palladium chloride (1965)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 18 (1965), S. 924-926 
    Details
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0365110X65002232
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  • 4
    Electronic Resource
    Electronic Resource
    The relativistic Hartree–Fock X-ray and electron form factors for mercury (1967)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 22 (1967), S. 153-153 
    Details
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0365110X67000246
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  • 5
    Electronic Resource
    Electronic Resource
    2-Fluoro-6-iodobenzonitrile (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. o702-o704 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound packs with two crystallographically independent molecules, both symmetry 1, with the same bond lengths and angles within experimental error. The molecules form a four-membered cyclamer held together by I...CN intermolecular Lewis acid–base interactions. The two independent N...I distances are 3.263 (6) and 3.344 (6) Å. The independent molecules are not related by any pseudosymmetry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801010923
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  • 6
    Electronic Resource
    Electronic Resource
    Relativistic Hartree–Fock X-ray and electron scattering factors (1968)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 24 (1968), S. 390-397 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Kinematic X-ray and electron scattering factors, found with the use of relativistic Hartree–Fock atomic fields, are tabulated for 76 atoms and ions. Parametric fits to these are given in the range of sin θ/λ from 0.0 to 2.0 Å−1. A method is developed to obtain the electron structure factor for forward scattering for a crystal containing ionized atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739468000756
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  • 7
    Electronic Resource
    Electronic Resource
    Dynamical calculation of thermal diffuse electron scattering (1969)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 25 (1969), S. 569-577 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The theory of Cowley & Pogany (Acta Cryst. (1968). A24, 109) is used for the numerical calculation of thermal diffuse electron scattering from thin monatomic crystals, along the line of a set of systematic reflexions. Dynamical interactions of 15 Bragg and 25 diffuse beams are considered for up to 183 Å of gold (200) systematics, treating the range of coherence of the interaction as a parameter of calculation. A one-phonon Debye model is used. It is found that thermal diffuse scattering will not produce strong thickness fringe contrast, but will yield Kikuchi bands and lines, with little dependence on the range of coherent interaction. The unindexed Kikuchi line at the centre of the bands is predicted. Thermal scattering tends to increase in the region of strong Bragg beams for tilted crystals. Compared to that predicted kinematically, dynamical thermal scattering is greater for thin crystals near principal orientations, but will in general be less for highly tilted and particularly for thick crystals; it is more spread out in the diffraction pattern, and far stronger in the first Brillouin zone. There is an indication that thermal streak patterns from thin crystals should be stronger than expected kinematically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739469001215
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  • 8
    Electronic Resource
    Electronic Resource
    The crystal structure of dipentene platinum(II) chloride (1965)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 18 (1965), S. 237-242 
    Details
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0365110X65000531
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  • 9
    Electronic Resource
    Electronic Resource
    Bis[(μ-1,3-diphenylpropane-1,3-dionato-O,O′:O′)dimethylthallium], [(CH3)2Tl(bzbz)]2 (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. m176-m178 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, [Tl2(CH3)4(C15H11O2)2], contains two five-coordinate Tl atoms. Two crystallographically independent molecules, symmetries 1 and \overline 1, have essentially the same geometry except for the rotations of the phenyl rings. The Tl—O distances in the monomer chelate ring average 2.467 (15) Å. The Tl—O distances between the two monomer units average 2.78 (2) Å. The Tl—C distances average 2.123 (11) Å. The Tl atoms are not coplanar with the chelate rings. The independent molecules are related by an approximate pseudosymmetry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801005311
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  • 10
    Electronic Resource
    Electronic Resource
    Dynamical calculation of electron scattering by plasmons in aluminum (1971)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 27 (1971), S. 109-116 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Plasmon diffuse scattering (PDS) is calculated for Al(111) systematics using the multi-slice approach to dynamical electron scattering. It is found that PDS contributes strongly to Kikuchi bands, and to the decrease in the mean absorption coefficient which occurs when energy filtering is removed. Thickness fringes are found, which are similar to those for Bragg beams except at low thickness. The different behaviour in this region is explained. The effect of the (111) Kikuchi band on the variation of the path length for plasmon excitation with crystal tilt is considered in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739471000238
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