xxx
Array
(
    [0] => Array
        (
            [id] => 1251
            [topology] => nas-d
            [link_rcsr] => http://rcsr.net/nets/nas-d
            [in_col] => 11
            [transitivity] => [(11)(20)(13)3]
            [space_group] => Pa-3
            [pearson] => cP232
            [cn] => 4
            [Year] => 2013
            [cn_sort] => 004-
            [topology_str] => nas-d
            [sp_atoms] => 
            [caid] => 322
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => -
            [e_gap] => 
            [energy] => -
            [bulk_mod] => -
            [shear_mod] => -
            [vicker_hard] => -
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1252
            [topology] => nas-d
            [link_rcsr] => http://rcsr.net/nets/nas-d
            [in_col] => 11
            [transitivity] => [(11)(20)(13)3]
            [space_group] => Pa-3
            [pearson] => cP232
            [cn] => 4
            [Year] => 2013
            [cn_sort] => 004-
            [topology_str] => nas-d
            [sp_atoms] => 
            [caid] => 322
            [nn] => 1
            [name] => KXI
            [pressure] => 
            [density] => 3.00
            [e_gap] => 3.92
            [energy] => 
            [bulk_mod] => 355.1
            [shear_mod] => 
            [vicker_hard] => 81.8
            [ref_file] => /References/2013_JChemPhys138_164703_KelvinC
            [publ_year] => 2013
            [ref] => 
        )

)
xxx