xxx
Array
(
    [0] => Array
        (
            [id] => 1671
            [topology] => 4<sup>2</sup>T286
            [link_rcsr] => 
            [in_col] => 2
            [transitivity] => [2763]
            [space_group] => P2/m
            [pearson] => mP8
            [cn] => 4
            [Year] => 2019
            [cn_sort] => 004-
            [topology_str] => 4^2T286
            [caid] => 524
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.471
            [e_gap] => 
            [energy] => 0.531
            [bulk_mod] => 401.2
            [shear_mod] => 235.0
            [vicker_hard] => 27.6
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1672
            [topology] => 4<sup>2</sup>T286
            [link_rcsr] => 
            [in_col] => 2
            [transitivity] => [2763]
            [space_group] => P2/m
            [pearson] => mP8
            [cn] => 4
            [Year] => 2019
            [cn_sort] => 004-
            [topology_str] => 4^2T286
            [caid] => 524
            [nn] => 1
            [name] => 4,4T286
            [pressure] => 
            [density] => 3.446
            [e_gap] => 2.12
            [energy] => 
            [bulk_mod] => 416
            [shear_mod] => 474
            [vicker_hard] => 83
            [ref_file] => /References/2019_SciRep_9_6007
            [publ_year] => 2019
            [ref] => 
        )

)
xxx