xxx
Array
(
    [0] => Array
        (
            [id] => 624
            [topology] => cbs-3,4-Pnma
            [link_rcsr] => 
            [in_col] => 2
            [transitivity] => [2542]
            [space_group] => Cmcm
            [pearson] => oS16
            [cn] => 3, 4 (1:1)
            [Year] => 2011
            [cn_sort] => 003-004-001-001-
            [topology_str] => cbs-3,4-Pnma
            [caid] => 134
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.128
            [e_gap] => 
            [energy] => 0.253
            [bulk_mod] => 351.2
            [shear_mod] => 281.2
            [vicker_hard] => 39.6
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 625
            [topology] => cbs-3,4-Pnma
            [link_rcsr] => 
            [in_col] => 2
            [transitivity] => [2542]
            [space_group] => Cmcm
            [pearson] => oS16
            [cn] => 3, 4 (1:1)
            [Year] => 2011
            [cn_sort] => 003-004-001-001-
            [topology_str] => cbs-3,4-Pnma
            [caid] => 134
            [nn] => 1
            [name] => 3D-(5,0)
            [pressure] => 
            [density] => 3.20
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 352.5
            [shear_mod] => 285.5
            [vicker_hard] => 40.9
            [ref_file] => /References/2011_ACSNano_7226
            [publ_year] => 2011
            [ref] => 
        )

    [2] => Array
        (
            [id] => 626
            [topology] => cbs-3,4-Pnma
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            [in_col] => 2
            [transitivity] => [2542]
            [space_group] => Cmcm
            [pearson] => oS16
            [cn] => 3, 4 (1:1)
            [Year] => 2011
            [cn_sort] => 003-004-001-001-
            [topology_str] => cbs-3,4-Pnma
            [caid] => 134
            [nn] => 2
            [name] => mC16-carbon
            [pressure] => 
            [density] => 
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2014_JSupHardMat_36_257
            [publ_year] => 2014
            [ref] => 
        )

)
xxx