Transport and configurational properties

Phys. Chem. Planet. Int.,
107, 23-32, 1998

Transport and configurational properties of silicate melts: Relationship to melt structure at magmatic temperatures

B. O. Mysen

Geophysical Laboratory
5251 Broad Branch Rd., NW
Washington, DC 20015-1305, USA

Abstract

Configurational properties of silicate melts have been related to thermodynamic and transport behavior. Configurational heat capacity, Cpconf, of liquids above their glass transition temperatures have been calculated from high-temperature structural data of liquids. By calibrating configurational heat capacity of individual structural units, the Cpconf of the bulk melt was derived from temperature- and composition-dependent behavior of these units. This heat capacity is then used in conjunction with available molar free hindrance energy and frequency factors to compute the viscosity of silicate melts. The viscosities thus obtained concur, within experimental error, with experimentally determined viscosities. Because of the functional relationships between viscosity, diffusivity, and conductivity, the latter parameters can be computed from melt structure data.

SCOPE OF RESEARCH INTERESTS	RESEARCH INTERESTS	CURRENT RESEARCH ACTIVITIES
ABSTRACTS (LIST)	SCIENTIFIC PUBLICATIONS

[1], [2], [3], [4],
[5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18],
[19], [20], [21], [22], [23], [24], [25]

Have a good day!

Email: mysen@gl.ciw.edu