AtomNames=['Co' ]
hcp_a= 2.51
hcp_c= hcp_a*1.624

cellvectors=Numeric.array( 
         [ 
           [ hcp_a*math.sqrt(3.0)/2.0  ,  hcp_a/2    ,  0.0],
           [ hcp_a*math.sqrt(3.0)/2.0  , -hcp_a/2    ,  0.0], 
           [0.0   , 0.0     ,  hcp_c ] 
         ] )

PositionsList=[
          Numeric.array(  
              [ [0.0,       0.0,       0.0  ],
                [1/3.0,       1/3.0,       0.5  ],
              ]    
          ),
	           
]
SeekedTetragon=[('Co',0),('Co',1),('Co',0),('Co',0)]
CellsCoo=[(0,0,0),(0,0,0),(1,0,0),(0,1,0)]
dr_shell=0.0005
num_nei=8





