xxx
Array
(
    [0] => Array
        (
            [id] => 877
            [topology] => 3<sup>4</sup>T14
            [link_rcsr] => 
            [in_col] => 4
            [transitivity] => [4542]
            [space_group] => P42/mmc
            [pearson] => tP16
            [cn] => 3
            [Year] => 2015
            [cn_sort] => 003-
            [topology_str] => 3<sup>4</sup>T14
            [caid] => 208
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 2.809
            [e_gap] => 
            [energy] => 1.455
            [bulk_mod] => -
            [shear_mod] => -
            [vicker_hard] => -
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 878
            [topology] => 3<sup>4</sup>T14
            [link_rcsr] => 
            [in_col] => 4
            [transitivity] => [4542]
            [space_group] => P42/mmc
            [pearson] => tP16
            [cn] => 3
            [Year] => 2015
            [cn_sort] => 003-
            [topology_str] => 3<sup>4</sup>T14
            [caid] => 208
            [nn] => 1
            [name] => GT-16
            [pressure] => 
            [density] => 2.960
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 347.6
            [shear_mod] => 135.1
            [vicker_hard] => 
            [ref_file] => /References/2015_PhysChemChemPhys_17_13028
            [publ_year] => 2015
            [ref] => 
        )

)
xxx