The radial distribution curve of "anomalous" water by x-ray diffraction

Author

Jerome Dechelette

Abstract

"Amorphous and liquid samples, believed to be "anomalous" water were studied by X-ray diffraction. A diffusion ring, characteristic of liquids and glass was observed at Θ =10.5º. For purposes of comparison an X-ray diffraction pattern was obtained for pure water under nearly identical conditions. By means of a microdensitometer, X-ray intensity curves were prepared from the diffraction patterns and corrected for absorption and polarization. From the Fourier transform of the intensities, we obtained the radial distribution curves. The radial distribution curve for water, obtained in previous work, shows an initial peak at 2.9Å. This peak is due to the nearest neighboring atoms and its position corresponds to the average 0 - 0 distance. The radial distribution curve of "anomalous" water exhibits two peaks at 1.9Å and 2.9Å. The first peak corresponds to a minimum for the normal water curve. These two distances can be interpreted as the distance Si-C and 0 - 0. Predicted 0 - 0 distances of 2.3 - 2.4Å are not observed. Furthermore, the radial distribution function of anomalous water shows a minimum at 2.4Å. The existing theoretical treatments of the structure of anomalous water are inadequate and more work is required to reach a satisfactory understanding of this material "--Abstract, page ii.

Advisor(s)

James, William Joseph

Committee Member(s)

Levenson, L. L., 1928-1998
Long, Gary J., 1941-

Department(s)

Chemistry

Degree Name

M.S. in Chemistry

Sponsor(s)

University of Missouri--Rolla. Graduate Center for Materials Research

Publisher

University of Missouri--Rolla

Publication Date

1970

Pagination

vii, 67 pages

Note about bibliography

Includes bibliographical references (page 10).

Rights

© 1970 Jerome Dechelette, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Polywater -- Analysis -- Mathematical modelsX-rays -- Diffraction

Thesis Number

T 2487

Print OCLC #

6029292

Electronic OCLC #

869553758

Recommended Citation

Dechelette, Jerome, "The radial distribution curve of "anomalous" water by x-ray diffraction" (1970). Masters Theses. 7181.
https://scholarsmine.mst.edu/masters_theses/7181