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/ These are the examples of ABACUS program.
/
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These examples show how to use standard Bravias lattice type to set the cell.
   - set 'latname' to one of the below types:
         - `sc`: simple cubie.
         - `fcc`: face-centered cubic.
         - `bcc`: body-centered cubic.
         - `hexagonal`: hexagonal.
         - `trigonal`: trigonal.
         - `st`: simple tetragonal.
         - `bct`: body-centered tetragonal.
         - `so`: simple orthorhombic.
         - `baco`: base-centered orthorhombic.
         - `fco`: face-centered orthorhombic.
         - `bco`: body-centered orthorhombic.
         - `sm`: simple monoclinic.
         - `bacm`: base-centered monoclinic.
         - `triclinic`: triclinic. 
   - set the value of 'LATTICE_PARAMETERS' in the 'STRU' file.

A detail description of the setting of 'STRU' file can be found in: 
https://github.com/deepmodeling/abacus-develop/blob/develop/docs/input-stru.md


