xxx
Array
(
    [0] => Array
        (
            [id] => 1545
            [topology] => 4<sup>16</sup>T18
            [link_rcsr] => 
            [in_col] => 16
            [transitivity] => [(16)(24)(21)(13)]
            [space_group] => Im
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            [pressure] => 
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            [shear_mod] => 430.2
            [vicker_hard] => 80.5
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1546
            [topology] => 4<sup>16</sup>T18
            [link_rcsr] => 
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            [space_group] => Im
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            [energy] => 
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            [ref_file] => /References/2017_ChemPhysChem_18_873
            [publ_year] => 2017
            [ref] => 
        )

)
xxx