Accession Number : ADA019652

Title :   A Pressure Calibration for the Diamond-Anvil Cell in the Range O-15K Bars.

Descriptive Note : Technical rept.,

Corporate Author : RUTGERS - THE STATE UNIV NEW BRUNSWICK N J DEPT OF MECHANICS AND MATERIALS SCIENCE

Personal Author(s) : Newman,B. A. ; Sham,T. P. ; Pae,K. D.

Report Date : 31 DEC 1975

Pagination or Media Count : 11

Abstract : An X-ray pressure-standard suitable for use with the diamond-anvil cell, at pressures up to 15K bars, has been developed. A pressure-volume relationship was assumed for hexamethylenetetramine (H.M.T.), and a least squares program was used to fit the equation to experimental data obtained at 298K. Using this relation a table of interplanar spacings of the (110) planes at different pressures was constructed. The derived equation is discussed in terms of the volume compressibility, and the Gruneisen constant for H.M.T.

Descriptors :   *Calibration, *X ray diffraction, Sensitivity, Crystal structure, Phase transformations, Sodium chloride, Accuracy, Volume, Polycyclic compounds, High pressure, Laboratory equipment

Subject Categories : Physical Chemistry
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE