.. title: ORTEP .. slug: ortep .. date: 2013-03-04 .. tags: Crystallography .. link: http://www.ornl.gov/sci/ortep/ortep.html .. category: Freeware .. type: text freeware .. comments: ORTEP (Oak Ridge Thermal Ellipsoid Plot) is a program for drawing crystal structure illustrations. Ball-and-stick type illustrations of a quality suitable for publication are produced with either spheres or thermal-motion probability ellipsoin probability ellipsoids, derived from anisotropic temperature factor parameters, on the atomic sites. There is also a Linux-specific Linux ORTEP page.