xxx
Array
(
    [0] => Array
        (
            [id] => 1465
            [topology] => 4<sup>16</sup>T10
            [link_rcsr] => 
            [in_col] => 16
            [transitivity] => [(16)(32)(29)(13)]
            [space_group] => P1
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            [caid] => 421
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.394
            [e_gap] => 
            [energy] => 0.909
            [bulk_mod] => 394.1
            [shear_mod] => 427.6
            [vicker_hard] => 79.4
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1466
            [topology] => 4<sup>16</sup>T10
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            [density] => 
            [e_gap] => 
            [energy] => 
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            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2017_ChemPhysChem_18_873
            [publ_year] => 2017
            [ref] => 
        )

)
xxx