On the X-Ray Diffuse Scattering by 1-3-5-Triphenylbenzene

Abstract

In crystalline 1-3-5-triphenylbenzene every four molecules form a pseudo-hexagonal orthorhombic unit cell with the [100] as the pseudo-hexagonal axis. The deviation from hexagonal symmetry which is only 0° 19' is discussed in terms of both the crystal structure and the diffuse scattering reflections shown by a Laue photograph taken with the X-ray beam parallel to the [100] axis. Two other Laue photographs with the X-ray beam parallel to the [010] and [001] axes are given. All the diffuse scattering reflections in the three photographs are indexed and the types of elastic waves (of thermal origin) affecting the crystal lattice are revealed.