xxx
Array
(
    [0] => Array
        (
            [id] => 638
            [topology] => 3,4T227
            [link_rcsr] => 
            [in_col] => 2
            [transitivity] => [2563]
            [space_group] => Cmcm
            [pearson] => oS24
            [cn] => 3, 4 (1:2)
            [Year] => 2016
            [cn_sort] => 003-004-001-002-
            [topology_str] => 3,4T227
            [caid] => 140
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.171
            [e_gap] => 
            [energy] => 0.329
            [bulk_mod] => 367.0
            [shear_mod] => 329.4
            [vicker_hard] => 54.2
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 639
            [topology] => 3,4T227
            [link_rcsr] => 
            [in_col] => 2
            [transitivity] => [2563]
            [space_group] => Cmcm
            [pearson] => oS24
            [cn] => 3, 4 (1:2)
            [Year] => 2016
            [cn_sort] => 003-004-001-002-
            [topology_str] => 3,4T227
            [caid] => 140
            [nn] => 1
            [name] => oC24
            [pressure] => 52.8
            [density] => 
            [e_gap] => 1.29
            [energy] => 
            [bulk_mod] => 371.4
            [shear_mod] => 340.4
            [vicker_hard] => 51.7
            [ref_file] => /References/2016_AIPAdvance_055020
            [publ_year] => 2016
            [ref] => 
        )

)
xxx