PHYSICAL PROPERTIES OF ALPHA AND GAMMA ARSENIC,
Abstract
The unit cell dimensions and the electrical and magnetic properties of crystalline (a) arsenic have been measured as a function of temperature. The resistivities at 293K parallel and perpendicular to the major (trigonal) crystallographic axis and the temperature coefficients are given. The magnetic susceptibilities of a single crystal specimen at 292K were measured. The signs and magnitudes of these values were confirmed by the determination of the magnetic anisotropy of three single crystals in a homogeneous field. The susceptibilities of several polycrystalline specimens are recorded and discussed. The hexagonal unit cell dimensions at 295.6K are: a = 3.7598=0.0003 A; c = 10.547 =0.002 A. Between 295 and 673K there is little or no change in the unit cell parallel to the basal plane. The coefficient of expansion along the c axis is 47.000002/deg. No evidence was found for a second order transformation in alpha As at ca. 500K as suggested by Klemm. Amorphous alpha arsenic is diamagnetic, the susceptibility at 298K being -22.6 = .000003 emu/g atom. The susceptibility is only slightly temperature dependent from 80 to 450K. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 27, 1964
- Accession Number
- AD0614506
Entities
People
- J. B. Taylor
- R. D. Heyding
- Susan L. Bennett
Organizations
- National Research Council Canada