%BLOCK LATTICE_CART
   0.0000000000000000   2.7149999999999999   2.7149999999999999
   2.7149999999999999   0.0000000000000000   2.7149999999999999
   2.7149999999999999   2.7149999999999999   0.0000000000000000
%ENDBLOCK LATTICE_CART

%BLOCK POSITIONS_FRAC
Si  0.0000000000  0.0000000000  0.0000000000 
Si  0.2500000000  0.2500000000  0.2500000000 
%ENDBLOCK POSITIONS_FRAC

