xxx
Array
(
    [0] => Array
        (
            [id] => 216
            [topology] => neb
            [link_rcsr] => http://rcsr.net/nets/neb
            [in_col] => 1
            [transitivity] => [1221]
            [space_group] => Fddd
            [pearson] => oF16
            [cn] => 4
            [Year] => 2004
            [cn_sort] => 004-
            [topology_str] => neb
            [caid] => 30
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.581
            [e_gap] => 
            [energy] => 1.675
            [bulk_mod] => 380.6
            [shear_mod] => 415.1
            [vicker_hard] => 77.2
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 217
            [topology] => neb
            [link_rcsr] => http://rcsr.net/nets/neb
            [in_col] => 1
            [transitivity] => [1221]
            [space_group] => Fddd
            [pearson] => oF16
            [cn] => 4
            [Year] => 2004
            [cn_sort] => 004-
            [topology_str] => neb
            [caid] => 30
            [nn] => 1
            [name] => H-carbon
            [pressure] => 
            [density] => 3.532
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2004_PhysRev_B_70_045101
            [publ_year] => 2004
            [ref] => 
        )

    [2] => Array
        (
            [id] => 218
            [topology] => neb
            [link_rcsr] => http://rcsr.net/nets/neb
            [in_col] => 1
            [transitivity] => [1221]
            [space_group] => Fddd
            [pearson] => oF16
            [cn] => 4
            [Year] => 2004
            [cn_sort] => 004-
            [topology_str] => neb
            [caid] => 30
            [nn] => 2
            [name] => 
            [pressure] => 
            [density] => 
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2013_ZKristallogr_228_343_346
            [publ_year] => 2013
            [ref] => 
        )

)
xxx