geom: hex
symmetry: third periodic
lattice map: |
  -     SH   SH   SH
  -  SH   SH   SH   SH
   SH   RR   RR   RR   SH
     RR   RR   RR   RR   SH
   RR   RR   RR   RR   RR   SH
     RR   OC   OC   RR   RR   SH
       OC   OC   OC   RR   RR   SH
     OC   OC   OC   OC   RR   RR
       OC   MC   OC   OC   RR   SH
         MC   MC   PC   OC   RR   SH
       MC   MC   MC   OC   OC   RR
         MC   MC   MC   OC   RR   SH
           PC   MC   MC   OC   RR   SH
         MC   MC   MC   MC   OC   RR
           IC   MC   MC   OC   RR   SH
             IC   US   MC   OC   RR
           IC   IC   MC   OC   RR   SH
             IC   MC   MC   OC   RR
           IC   IC   MC   PC   RR   SH