xxx
Array
(
    [0] => Array
        (
            [id] => 815
            [topology] => 4<sup>3</sup>T130
            [link_rcsr] => 
            [in_col] => 3
            [transitivity] => [3663]
            [space_group] => P41212
            [pearson] => tP20
            [cn] => 4
            [Year] => 2015
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            [caid] => 182
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.435
            [e_gap] => 
            [energy] => 0.703
            [bulk_mod] => 430.4
            [shear_mod] => 468.9
            [vicker_hard] => 87.2
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 816
            [topology] => 4<sup>3</sup>T130
            [link_rcsr] => 
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            [pearson] => tP20
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            [caid] => 182
            [nn] => 1
            [name] => P41212
            [pressure] => 
            [density] => 
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 413
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2015PhysRevB91_214104
            [publ_year] => 2015
            [ref] => 
        )

)
xxx