Masters Theses


"The vapour pressure of germanium monosulfide (liquid) was determined by a boiling point method. An expression for the vapour pressure as a function of temperature was obtained and the heat of vapourization calculated. Using the heat of sublimation data obtained by other investigators, the heat of fusion was calculated.

The thermodynamic properties, change of standard free energy (Δ F°) heat content (Δ H°) and entropy (Δ S°); of germanium disulfide were determined by using an indirect method. The equilibrium H2S/H2O ratios are determined for the reaction:

GeS2 (s) + 2H2O(g) = GeO2 (s) + 2H2S(g),

in the temperature range of 410-560°C by using a flow method and extrapolating the values of H2/H2O ratios to zero flow rate. An expression for the standard free energy of the reaction as a function of temperature was obtained. Using the known values of standard free energy of formation of GeO2(s), H2S(g) and H2O(g) an expression for the dissociation of germanium disulfide was calculated.

A detailed description is given for the methods and the apparatus used for both the vapour pressure and equilibrium studies.

The methods used for the preparation of the compounds GeS2 and GeS and their properties are described. X-ray diffraction patterns are given for GeS2, GeS and GeO2 phases"--Abstract, pages i-ii.


Larson, Andrew H.

Committee Member(s)

Schlechten, A. W.
James, William Joseph
Lorey, G. Edwin


Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering


Page 100 follows page 101.


Missouri School of Mines and Metallurgy

Publication Date



ix, 115 pages

Note about bibliography

Includes bibliographical references (pages 105-107).


© 1960 Sham Lal Malhotra, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Germanium compounds -- Analysis
Germanium compounds -- Heat treatment
Vapor pressure -- Measurement

Thesis Number

T 1291

Print OCLC #


Electronic OCLC #


Included in

Metallurgy Commons