xxx
Array
(
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        (
            [id] => 1225
            [topology] => 4<sup>10</sup>T9
            [link_rcsr] => 
            [in_col] => 10
            [transitivity] => [(10)(13)(13)10]
            [space_group] => Cmcm
            [pearson] => oS56
            [cn] => 4
            [Year] => 2016
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            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 3.493
            [e_gap] => 
            [energy] => 0.620
            [bulk_mod] => 419.0
            [shear_mod] => 487.8
            [vicker_hard] => 92.1
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1226
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            [space_group] => Cmcm
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            [cn_sort] => 004-
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            [caid] => 310
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            [density] => 
            [e_gap] => 4.042(D)
            [energy] => 
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            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2016_PhysRevB_93_085201
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            [ref] => 
        )

)
xxx