xxx
Array
(
    [0] => Array
        (
            [id] => 1601
            [topology] => 4<sup>6</sup>T44
            [link_rcsr] => 
            [in_col] => 6
            [transitivity] => [6(14)(12)4]
            [space_group] => C2
            [pearson] => mS20
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            [Year] => 2017
            [cn_sort] => 004-
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            [caid] => 489
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.333
            [e_gap] => 
            [energy] => 1.123
            [bulk_mod] => 363.6
            [shear_mod] => 393.3
            [vicker_hard] => 73.0
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1602
            [topology] => 4<sup>6</sup>T44
            [link_rcsr] => 
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            [transitivity] => [6(14)(12)4]
            [space_group] => C2
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            [cn_sort] => 004-
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            [caid] => 489
            [nn] => 1
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            [density] => 
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2017_ChemPhysChem_18_873
            [publ_year] => 2017
            [ref] => 
        )

)
xxx