I'm sure this can be done but perhaps some kind soul will please tell me how? I want to display a salt, say MgO, using a .pdb file, or any other format that *both* Chime and the Chem3D plug-ins will both display properly. The radius of oxygen in this environment, as O2-, is larger than a covalent oxygen atom radius. I see no way with a .pdb file to specify a radius for atoms, and so to over ride the defaults. Suggestions please! -- Dr Mark J Winter Department of Chemistry, The University, Sheffield S3 7HF, England tel: +44 (0)114 222 9304 fax: +44 (0)114 222 9303 e-m: mark.winter@sheffield.ac.uk http://www.shef.ac.uk/chemistry/staff/mjw/mark-winter.html WebElements is the periodic table on the world-wide web: http://www.webelements.com/ The Sheffield Chemdex is a listing of chemistry sites on the world-wide web: http://www.chemdex.org/ chemweb: A list for Chemical Applications of the Internet. To post to list: mailto:chemweb@ic.ac.uk Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To (un)subscribe, mailto:majordomo@ic.ac.uk the following message; (un)subscribe chemweb List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)