netcdf Silicon {
dimensions:
  number_of_atom_species = 1;
  number_of_atoms = 2;
  character_string_length = 80;
  number_of_reduced_dimensions = 3;
  number_of_vectors = 3;

variables:
  char atom_species_names(number_of_atom_species, character_string_length);
  int atom_species(number_of_atoms);
  double reduced_atom_positions(number_of_atoms, number_of_reduced_dimensions);
  double primitive_vectors(number_of_vectors, number_of_reduced_dimensions);

  // Global attributes
  :file_format = "ETSF Nanoquanta";
  :file_format_version = 1.2;
  :Conventions = "http://www.etsf.eu/fileformats";
  :title = "Silicon in primitive lattice.";

data:
  atom_species_names = "Si";
  atom_species = 1, 1;
  reduced_atom_positions = 0., 0., 0., 0.25, 0.25, 0.25;
  primitive_vectors = 0., 2.715, 2.715,
                      2.715, 0., 2.715,
                      2.715, 2.715, 0.;
}