Observation and Modelling of Preferred Orientation in Two-Dimensional Powder Patterns

A novel approach to the detection and modelling of preferred orientation is presented, based on the interpretation of two‐dimensional powder patterns. A simple graphical construction is introduced to aid interpretation, and the application of this construction to some standard diffraction geometries is discussed. It is also shown in outline how a standard preferred‐orientation model can be adapted to describe two‐dimensional data.