Abstract
The crystal structure of vonsenite (iron-rich ludwigite) was determined by two dimensional fourier synthesis. The unit cell has the dimensions, a0=9.73Å, b0=12.35Å, c0=3.05Å. The space group is Pbam. The structure is essentially the same as the structure of ludwigite obtained by earlier study. However, the present work was based upon much more accurate intensity data, so that the results provide a knowledge of the interatomic distances in detail.
