fixcell 3.50, by Axel van de Walle
-d Use all default values (Default: Off)
-c read and print cell in cartesian only (no axes specified) (Default: Off)
-z=[real] Tolerance for finding symmetry operations (default: 1e-3)
-b print bravais lattice type only and conventional (potentially not primitive) cell
(Default: Off)
-sig=[int] Number of significant digits to print in output files (Default: 6)