xxx
Array
(
    [0] => Array
        (
            [id] => 1272
            [topology] => ajk10
            [link_rcsr] => 
            [in_col] => 13
            [transitivity] => [(13)(20)(14)5]
            [space_group] => P63/mmc
            [pearson] => hP136
            [cn] => 4
            [Year] => 2011
            [cn_sort] => 004-
            [topology_str] => ajk10
            [caid] => 332
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.063
            [e_gap] => 
            [energy] => 0.671
            [bulk_mod] => 371.1
            [shear_mod] => 416.3
            [vicker_hard] => 78.0
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
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            [space_group] => P63/mmc
            [pearson] => hP136
            [cn] => 4
            [Year] => 2011
            [cn_sort] => 004-
            [topology_str] => ajk10
            [caid] => 332
            [nn] => 1
            [name] => clathrates II-4H
            [pressure] => 
            [density] => 3.05
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 404
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2011_JPCC_finland
            [publ_year] => 2011
            [ref] => 
        )

    [2] => Array
        (
            [id] => 1274
            [topology] => ajk10
            [link_rcsr] => 
            [in_col] => 13
            [transitivity] => [(13)(20)(14)5]
            [space_group] => P63/mmc
            [pearson] => hP136
            [cn] => 4
            [Year] => 2011
            [cn_sort] => 004-
            [topology_str] => ajk10
            [caid] => 332
            [nn] => 2
            [name] => clathrates II-4H
            [pressure] => 
            [density] => 3.05
            [e_gap] => 6.0
            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2011_InorgChem_50_1733_1742_1733
            [publ_year] => 2011
            [ref] => 
        )

    [3] => Array
        (
            [id] => 1275
            [topology] => ajk10
            [link_rcsr] => 
            [in_col] => 13
            [transitivity] => [(13)(20)(14)5]
            [space_group] => P63/mmc
            [pearson] => hP136
            [cn] => 4
            [Year] => 2011
            [cn_sort] => 004-
            [topology_str] => ajk10
            [caid] => 332
            [nn] => 3
            [name] => clathrates II-4H
            [pressure] => 
            [density] => 
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2013CPC_FInland
            [publ_year] => 2013
            [ref] => 
        )

)
xxx