Contents
Crystallography Reports

Vol. 44, No. 1, 1999

Simultaneous English language translation of the journal is available from “ / Interperiodica” (Russia).
Distributedworldwide by the American Institute of Physics. Crystallography Reports ISSN 1063-7745.

On the 75th Birthday of Lev Aleksandrovich Shuvalov 1

KNb₄O₅F and NbO₂ Crystal Structures. Structural Aspect of Chemical Decomposition
of K_{2 – x}Nb₄O₃(O,F)₃F in the Melt of Sodium and Potassium Chlorides

A. V. Arakcheeva, V. V. Grinevich, V. F. Shamrai, M. Meyer, and G. Chapuis p. 2  abstract

Molecular and Crystal Structure of the Antibiotic Enniatin B,
a Secondary Microbial Metabolite

N. E. Zhukhlistova, G. N. Tishchenko, I. V. Tolstykh, and V. A. Zenkova p. 8  abstract

Molecular Interaction and Crystal Packing in Products of Polymerization of Fullerene C₆₀
under High Pressures

A. V. Dzyabchenko, V. N. Agafonov, and V. A. Davydov p. 13  abstract

Theoretical Molecular Packings and the Structural Model of Solid-Phase Polymerization
of Fullerene C₆₀ Under High Pressures

A. V. Dzyabchenko, V. N. Agafonov, and V. A. Davydov p. 18  abstract

Degenerate Structure of Tridymite and Its “Filled” Derivatives

V. I. Torgashev and L. T. Latush p. 25  abstract

Structure and Physical Properties of a Number of New Binary
Systems (1 – x)Pb(Nb_1/2)O₃–xPbTiO₃

A. Shternberg, L. hebanovs, J. Yamashita, M. Antonova, M. Lvi, and I. Shorubalko p. 35  abstract

Oscillating Phase Transformations at the Initial Stage of Relaxation
in the Hydrogen-Saturated Pd–Er Alloy

V. M. Avdyukhina, A. A. Katsnel’son, and G. P. Revkevich p. 44  abstract

Neutron Diffraction Study of Structural Variations in ND₄I and ND₄F Ammonium
Halides under High Pressures

V. P. Glazkov, D. P. Kozlenko, B. N. Savenko, V. A. Somenkov, and S. Sh. Shil’shtein p. 50  abstract

Neutron Diffraction Study of the Atomic Structure of the Ferroelectric Phase
of (CH₃)₂NH₂Al(SO₄)₂ 6H₂O Ferroelectric–Ferroelastic (DMAAS)

V. Yu. Kazimirov, V. A. Sarin, C. Ritter, and L. A. Shuvalov p. 56  abstract

Neutron Scattering by Heavy Water and Ice under Hydrostatic Pressure of Argon

G. G. Malenkov, A. A. Averkiev, L. Bobrowicz-Sarga, S. I. Bragin, I. Natkaniec,
and L. S. Smirnov p. 62  abstract

Twinned La₂CuO₄ Structure

A. M. Balagurov, A. I. Beskrovnii, V. Yu. Pomyakushin, V. G. Simkin,
B. Sh. Bagautdinov, V. Sh. Shekhtman, and A. A. Zakharov p. 69  abstract

X-ray and Neutron Powder Diffraction Studies of Phase Transitions in LiCsSO₄

L. Mestres, M. L. Martinez-Sarrion, A. Baccali, V. G. Simkin, L. S. Smirnov,
and A. M. Balagurov p. 78  abstract

Pressure-Temperature Phase Diagram of [N(CH₃)₄]₂CuCl₄

K. Gesi p. 84  abstract

Superionic Transitions in the K_{1 – x}Ti_{1 – x}Nb_xOPO₄ and K₃Nb₃B₂O₁₂ Crystals

T. Yu. Losevskaya, E. P. Kharitonova, V. I. Voronkova, V. K. Yanovskii, S. Yu. Stefanovich,
N. I. Sorokina, and V. I. Simonov p. 90  abstract

Phase Transitions in Solid Solutions of Strontium and Barium Pyrotantalates

V. A. Isupov p. 93  abstract

Polar and Vibrational Properties of Dimethylammonium Cation and Orientational Ordering
in the Ferroelectric Phase Transition in a Dimethylammoniumsulphate Hexahydrate
(DMAAS) Ferroelectric–Ferroelastic Crystal

M. B. Smirnov, I. S. Ignat’ev, V. Yu. Kazimirov, and L. A. Shuvalov p. 98  abstract

A Study of Dielectric Properties of Partly Deuterated and Doped DMAAS Crystals
at Low Temperatures

L. F. Kirpichnikova, W. Bednarsky, S. Waplak, L. A. Shuvalov, and V. V. Dolbinina p. 106  abstract

Unipolar State of a Ferroelectric Plate with Oriented Polar Defects

A. S. Sidorkin and A. S. Sigov p. 109  abstract

Ferroelectric Domain Engineering for Nonlinear Optical Devices

G. Rosenman and A. Skliar p. 112  abstract

Heat Capacity of Mixed (NH₄Rb)₃H(SO₄)₂ Crystals

E. D. Yakushkin, A. I. Baranov, and V. N. Anisimova p. 116  abstract

Anionic Conductivity in Na_{0.5 – x}(R,R*)_{0.5 + x}F_{2 + 2x} Single Crystals (R,R* = RE)
with the Defect Fluorite-Type Structure

N. I. Sorokin, A. A. Bystrova, E. A. Krivandina, P. P. Fedorov, and B. P. Sobolev p. 120  abstract

Behavior of Low-Temperature Magnetoresistance in Some LaMnO₃-based Compounds

M. K. Gubkin, T. M. Perekalina, V. A. Chubarenko, and A. Ya. Shapiro p. 124  abstract

Diffuse Reflection Spectra of Natural Titanium Silicates

Z. B. Perekalina and A. P. Khomyakov p. 130  abstract

Effect of Thermooptical Recording in LiNbO₃ Crystals

B. B. Ped’ko, I. L. Kislova, T. R. Volk, E. V. Lebedev p. 134  abstract

Propagation of Light in a Biaxial Crystalline Film under Oblique Incidence of Light

A. F. Konstantinova, A. Yu. Tronin, B. V. Nabatov, and E. A. Evdishchenko p. 140  abstract

Review

Phenomenological Theory of Phase Diagrams Involving Incommensurate Phase

D. G. Sannikov p. 148  abstract

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