Contents
Glass Physics and Chemistry

Vol. 23, No. 1, 1997

Viscosity of Borate Glass-forming Melts: Specific Features of the BO₄ Tetrahedron as a Kinetic Unit

S. V. Nemilov p. 1  abstract

The Sol–Gel Synthesis of Optical Vitreous Materials from Colloidal Silicas:
Basic Methods and Prospects for Applications

G. T. Petrovskii, V. S. Shashkin, and A. K. Yakhkind p. 27  abstract

Microregions of Cooperative Structural Transformations at the Semiconductor–Metal Transition
in As₂Te₃ Melt

Yu. S. Tver’yanovich, A. S. Tver’yanovich, and V. M. Ushakov p. 36  abstract

A Study of Structural Features of Alkali Fluorophosphate Glasses with Group II–IV Fluorides

L. N. Urusovskaya and E. V. Smirnova p. 40  abstract

The Regularities of Metastable Immiscibility in the Na₂O–B₂O₃–SiO₂ System:
Lower- and Upper-Temperature Boundaries

I. G. Polyakova p. 45  abstract

Quantum-Chemical Simulation of the Transformations of Continuous Random Network
in the Vitreous GeO₂

A. S. Zyubin, O. A. Kondakova, and S. A. Dembovsky p. 58  abstract

Relaxation Channels of Triplet Excited States in Oxygen-Deficient Centers
of Germanium-Doped Silica Glasses

Yu. S. Zavorotny, A. O. Rybaltovskii, P. V. Chernov, V. N. Bagratashvili,
S. I. Tsypina, and L. Dong p. 67  abstract

Radiation-induced Formation of Color Centers and Cl₂ Molecules in Phosphate
and Halide-containing Phosphate Glasses

S. L. Kraevskii, A. M. Zyabnev, and V. F. Solinov p. 74  abstract

Optical Absorption and Composition of the Nearest Environment of Neodymium
in Glasses Based on the Gallium–Germanium–Chalcogen System

Yu. S. Tver’yanovich, S. V. Degtyarev, S. S. Pivovarov, and N. V. Belyakova p. 80  abstract

Optical Properties of Phosphate Glasses Activated with Cadmium Selenide

A. A. Onushchenko and E. L. Raaben p. 84  abstract

The Rates of Growth and Dissolution of the Disperse Phase Particles in Phase-Separated
Sodium Borosilicate Glass Doped with Calcium Oxide at Temperatures of 700 and 800°C

E. V. Morozova p. 89  abstract

Dilatometric Method for Measuring the Thermal Expansion of Softened Glass
in the Viscosity Range 10¹⁰–10⁵ P

V. P. Klyuev p. 94  abstract

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