xxx
Array
(
    [0] => Array
        (
            [id] => 391
            [topology] => hcp
            [link_rcsr] => http://rcsr.net/nets/hcp
            [in_col] => 1
            [transitivity] => [1232]
            [space_group] => P63/mmc
            [pearson] => hP2
            [cn] => 12
            [Year] => 1983
            [cn_sort] => 012-
            [topology_str] => hcp
            [caid] => 64
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 
            [e_gap] => 
            [energy] => HPP
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 392
            [topology] => hcp
            [link_rcsr] => http://rcsr.net/nets/hcp
            [in_col] => 1
            [transitivity] => [1232]
            [space_group] => P63/mmc
            [pearson] => hP2
            [cn] => 12
            [Year] => 1983
            [cn_sort] => 012-
            [topology_str] => hcp
            [caid] => 64
            [nn] => 1
            [name] => hcp
            [pressure] => >2300
            [density] => 
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/1983_PhysRevLett_50_2006
            [publ_year] => 1983
            [ref] => 
        )

    [2] => Array
        (
            [id] => 393
            [topology] => hcp
            [link_rcsr] => http://rcsr.net/nets/hcp
            [in_col] => 1
            [transitivity] => [1232]
            [space_group] => P63/mmc
            [pearson] => hP2
            [cn] => 12
            [Year] => 1983
            [cn_sort] => 012-
            [topology_str] => hcp
            [caid] => 64
            [nn] => 2
            [name] => hcp
            [pressure] => 
            [density] => 
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/1987_PhysRevB_36_3373
            [publ_year] => 1987
            [ref] => 
        )

)
xxx