Supercell program tutorial

Basic functionality: Ca2Al2SiO7. To understand how the supercell program works it is necessary to know the structure of Crystallographic Information File (CIF), which used both as the output and input formats. (The conversion to a number of other format is made very easy by the OpenBabel library, which is used by the program). The CIF file is a standard text file format for representing crystallographic information. The format promulgated by the International Union of Crystallography (IUCr) and the detailed information about it can be found at IUCr site (http://www.iucr.org/) The structure of the sections of a CIF file relevant to our program will be illustrated with the Ca2Al2SiO7.cif file located in the supercell/data/example folder.