Crystal clear! The routine collection of near single-crystal-quality diffraction data from a powdered sample is possible by exploiting the anisotropic thermal expansion of a molecular solid to enhance the extraction of diffracted intensities from a heavily overlapped powder diffraction pattern. The method is validated by the solution of the structure of 9-ethylbicyclo[3.3.1]nona-9-ol (see picture, O red, C blue, H gray) which is 50 % larger than other structures solved in a comparable way. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2003/z50607_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.