Acta Crystallographica Section B

Structural Science

Volume 50, Part 3 (June 1994)

Cover illustration: Fourier mao for the (100) plane in the Fe2Al5 structure and (inset) three-dimensional framework of Fe and Al1 atoms, see Burkhardt, Grin, Ellner & Peters, pages 313-316.

• research papers
• short communications

research papers

Acta Cryst. (1994). B50, 261-268    [ doi:10.1107/S0108768193009917 ]

Structure of a modulated monoclinic phase of Na₄TiP₂O₉

B. Maximov, N. Bolotina, V. Simonov, V. Petricek and H. Schulz

Acta Cryst. (1994). B50, 268-279    [ doi:10.1107/S0108768193010390 ]

Structural, vibrational and electronic properties of a crystalline hydrate from ab initio periodic Hartree-Fock calculations

L. Ojamäe, K. Hermansson, C. Pisani, M. Causà and C. Roetti

Acta Cryst. (1994). B50, 279-290    [ doi:10.1107/S0108768193013849 ]

Ab initio Hartree-Fock study of lithium and sodium sulfides: electronic and scattering properties

P. Azavant, A. Lichanot, M. Rerat and C. Pisani

Acta Cryst. (1994). B50, 290-294    [ doi:10.1107/S0108768193012625 ]

Structure of SAPO-31 refined from single-crystal diffraction data: substitution of P by Si established by diffraction methods

W. H. Baur, W. Joswig, D. Kassner, J. Kornatowski and G. Finger

Acta Cryst. (1994). B50, 294-306    [ doi:10.1107/S0108768193012765 ]

Structure refinement of the icosahedral quasicrystal Al₅₇Li₃₂Cu₁₁

L. Elcoro and J. M. Perez-Mato

Acta Cryst. (1994). B50, 307-312    [ doi:10.1107/S0108768193013096 ]

Crystal structure of -Al_4.5FeSi

C. Rømming, V. Hansen and J. Gjønnes

Acta Cryst. (1994). B50, 313-316    [ doi:10.1107/S0108768193013989 ]

Structure refinement of the iron-aluminium phase with the approximate composition Fe₂Al₅

U. Burkhardt, Yu. Grin, M. Ellner and K. Peters

Acta Cryst. (1994). B50, 316-326    [ doi:10.1107/S010876819400039X ]

The synergetic effect in beryllium sulfate tetrahydrate - an experimental electron-density study

T. Kellersohn, R. G. Delaplane and I. Olovsson

Acta Cryst. (1994). B50, 326-332    [ doi:10.1107/S0108768193013540 ]

Distortion in the CdS_1-ySe_y lattices: an example of relaxation in wurtzite compounds

A. Marbeuf, M. Barbe, A. Ramos, C. Levelut and S. Wszolek

Acta Cryst. (1994). B50, 333-343    [ doi:10.1107/S0108768193011425 ]

Incommensurately modulated structure of -PAMC: new experimental evidence for amplitude and phase fluctuations

M. Meyer, W. A. Paciorek, K. J. Schenk, G. Chapuis and W. Depmeier

Acta Cryst. (1994). B50, 344-348    [ doi:10.1107/S0108768193011656 ]

Oxalic acid dihydrate - an accurate low-temperature structural study using high-resolution neutron powder diffraction

A. Lehmann, P. Luger, C. W. Lehmann and R. M. Ibberson

Acta Cryst. (1994). B50, 348-357    [ doi:10.1107/S0108768193011966 ]

Lengthening of the covalent O-H bond in O-HO hydrogen bonds re-examined from low-temperature neutron diffraction data of organic compounds

T. Steiner and W. Saenger

Acta Cryst. (1994). B50, 358-363    [ doi:10.1107/S010876819301242X ]

Structure of thiocanate salt of 1,8-bis(dimethylamino)naphthalene (dmanH⁺.SCN^-) at 188 and 290 K

E. Bartoszak, M. Jaskólski, E. Grech, T. Gustafsson and I. Olovsson

Acta Cryst. (1994). B50, 363-373    [ doi:10.1107/S0108768193008523 ]

Structure and crystal packing of 4-aminobenzonitriles and 4-amino-3,5-dimethylbenzonitriles at various temperatures

A. Heine, R. Herbst-Irmer, D. Stalke, W. Kühnle and K. A. Zachariasse

Acta Cryst. (1994). B50, 373-381    [ doi:10.1107/S0108768193010766 ]

Structures of racemic monofluoro-substituted mandelic acids, their relation to the thermochemical properties and an analysis of short intermolecular fluorine-carbon contacts

S. Larsen and K. Marthi

Acta Cryst. (1994). B50, 382-395    [ doi:10.1107/S0108768194000911 ]

Symmetry-modified conformational mapping and classification of the medium rings from crystallographic data. II. exo-unsaturated and heterocyclic seven-membered rings

F. H. Allen, J. A. K. Howard, N. A. Pitchford and J. G. Vinter

Acta Cryst. (1994). B50, 395-404    [ doi:10.1107/S010876819400090X ]

Symmetry-modified conformational mapping and classification of the medium rings from crystallographic data. III. endo-unsaturated seven-membered rings

F. H. Allen, S. E. Garner, J. A. K. Howard and N. A. Pitchford

short communications

Acta Cryst. (1994). B50, 404    [ doi:10.1107/S0108768194003460 ]

Relationship between the structures of ferroelectric Pb₅Cr₃F₁₉ and antiferroelectric Pb₅Al₃F₁₉ at 295 K and the phase III-phase IV transition in Pb₅Al₃F₁₉ on cooling to about 110 K. Erratum

V. Andriamampianina, P. Gravereau, J. Ravez and S. C. Abrahams

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