xxx
Array
(
    [0] => Array
        (
            [id] => 1867
            [topology] => sqc5270
            [link_rcsr] => 
            [in_col] => 2
            [transitivity] => [2442]
            [space_group] => I4/mmm
            [pearson] => tI24
            [cn] => 4
            [Year] => 2021
            [cn_sort] => 004-
            [topology_str] => sqc5270
            [caid] => 622
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            [name] => 
            [pressure] => 
            [density] => 2.413
            [e_gap] => 
            [energy] => 0.929
            [bulk_mod] => 117.3
            [shear_mod] => 104.2
            [vicker_hard] => 16.9
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1868
            [topology] => sqc5270
            [link_rcsr] => 
            [in_col] => 2
            [transitivity] => [2442]
            [space_group] => I4/mmm
            [pearson] => tI24
            [cn] => 4
            [Year] => 2021
            [cn_sort] => 004-
            [topology_str] => sqc5270
            [caid] => 622
            [nn] => 1
            [name] => sqc5270
            [pressure] => 
            [density] => 
            [e_gap] => 
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            [shear_mod] => 
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            [ref_file] => /References/2021_npjComputMater_7_15
            [publ_year] => 2021
            [ref] => doi:&nbsp;<a href="http://doi.org/10.1038/s41524-021-00491-y" target="_blank">10.1038/s41524-021-00491-y</a>
        )

)
xxx