Buy article online - an online subscription or single-article purchase is required to access this article.
research papers
A method suitable for indexing X-ray powder photographs of compounds which give long-spacing reflexions is described. The method reduces the problem to that of a two-dimensional lattice. As an example, the unit cell of potassium caproate is deduced from its powder pattern by means of two graphical variants of the method. Limitations of the method are discussed.