Open AccessFurther work on two types of diamond
Author(s) -
Robert Robertson,
John Jacob Fox,
A. E. Martin
Publication year - 1936
Publication title -
proceedings of the royal society of london. series a, mathematical and physical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.814
H-Index - 135
eISSN - 2053-9169
pISSN - 0080-4630
DOI - 10.1098/rspa.1936.0217
Subject(s) - diamond , dielectric , refractive index , raman spectroscopy , diamond type , materials science , optics , optoelectronics , physics , material properties of diamond , composite material
In the paper "Two Types of Diamond" many physical properties of diamond are described, and on p. 516 are collected features of difference and of similarity between the two types. Briefly, the ordinary type (Type 1) is characterized by greater apparent homogeneity, Type 2 having a mosaic structure but greater isotropy in polarized light; in infra-red absorption Type 1 has a strong band at 8 μ, this being absent in Type 2; in the ultra-violet Type 1 absorbs up to a point much nearer the visible region than Type 2 which is transparent nearly as far out as quartz; Type 1 has little, Type 2 a marked photo-conductivity; while the X-ray pattern exhibits slight differences interpreted as supporting the greater degree of mosaicness of Type 2. The two types were similar in respect of the electron diffraction, the Raman spectrum, tribo-luminescence, dielectric constant, refractive index, specific gravity, and colour.