xxx
Array
(
    [0] => Array
        (
            [id] => 1877
            [topology] => stc-4,4-Fddd
            [link_rcsr] => 
            [in_col] => 2
            [transitivity] => [2331]
            [space_group] => Fddd
            [pearson] => oF32
            [cn] => 4
            [Year] => 2021
            [cn_sort] => 004-
            [topology_str] => stc-4,4-Fddd
            [caid] => 627
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.648
            [e_gap] => 
            [energy] => 1.131
            [bulk_mod] => 433.0
            [shear_mod] => 515.5
            [vicker_hard] => 97.7
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1878
            [topology] => stc-4,4-Fddd
            [link_rcsr] => 
            [in_col] => 2
            [transitivity] => [2331]
            [space_group] => Fddd
            [pearson] => oF32
            [cn] => 4
            [Year] => 2021
            [cn_sort] => 004-
            [topology_str] => stc-4,4-Fddd
            [caid] => 627
            [nn] => 1
            [name] => stc-4,4-Fddd
            [pressure] => 
            [density] => 
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [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