xxx
Array
(
    [0] => Array
        (
            [id] => 845
            [topology] => 4<sup>3</sup>T137
            [link_rcsr] => 
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            [transitivity] => [38(11)7]
            [space_group] => Pmmm
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            [e_gap] => 
            [energy] => 1.026
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            [shear_mod] => 321.9
            [vicker_hard] => 52.2
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 846
            [topology] => 4<sup>3</sup>T137
            [link_rcsr] => 
            [in_col] => 3
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            [space_group] => Pmmm
            [pearson] => oP16
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            [Year] => 2015
            [cn_sort] => 004-
            [topology_str] => 4<sup>3</sup>T137
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            [nn] => 1
            [name] => (4,0)
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            [e_gap] => 5.39
            [energy] => 
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            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2015_ChinPhysB_066102
            [publ_year] => 2015
            [ref] => 
        )

)
xxx