xxx
Array
(
    [0] => Array
        (
            [id] => 831
            [topology] => 4<sup>3</sup>T87
            [link_rcsr] => 
            [in_col] => 3
            [transitivity] => [3785]
            [space_group] => Cmcm
            [pearson] => oS24
            [cn] => 4
            [Year] => 1997
            [cn_sort] => 004-
            [topology_str] => 4<sup>3</sup>T87
            [caid] => 188
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.420
            [e_gap] => 
            [energy] => 0.729
            [bulk_mod] => 424.5
            [shear_mod] => 457.8
            [vicker_hard] => 84.9
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 832
            [topology] => 4<sup>3</sup>T87
            [link_rcsr] => 
            [in_col] => 3
            [transitivity] => [3785]
            [space_group] => Cmcm
            [pearson] => oS24
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            [topology_str] => 4<sup>3</sup>T87
            [caid] => 188
            [nn] => 1
            [name] => (R2L)2
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            [density] => 
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            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/1997_bct_C4first
            [publ_year] => 1997
            [ref] => 
        )

    [2] => Array
        (
            [id] => 833
            [topology] => 4<sup>3</sup>T87
            [link_rcsr] => 
            [in_col] => 3
            [transitivity] => [3785]
            [space_group] => Cmcm
            [pearson] => oS24
            [cn] => 4
            [Year] => 1997
            [cn_sort] => 004-
            [topology_str] => 4<sup>3</sup>T87
            [caid] => 188
            [nn] => 2
            [name] => Z-carbon-9
            [pressure] => 
            [density] => 
            [e_gap] => 2.86
            [energy] => 
            [bulk_mod] => 442
            [shear_mod] => 
            [vicker_hard] => 90.2
            [ref_file] => /References/2012_JAmChemSoc_134_7530
            [publ_year] => 2012
            [ref] => 
        )

)
xxx