xxx
Array
(
    [0] => Array
        (
            [id] => 1247
            [topology] => 3<sup>9</sup>,4T1
            [link_rcsr] => 
            [in_col] => 10
            [transitivity] => -
            [space_group] => Cmmm
            [pearson] => oS56
            [cn] => 3, 4 (13:1)
            [Year] => 2006
            [cn_sort] => 003-004-013-001-
            [topology_str] => 3<sup>9</sup>,4T1
            [caid] => 320
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => .824
            [e_gap] => 
            [energy] => 0.674
            [bulk_mod] => 47.8
            [shear_mod] => 30.0
            [vicker_hard] => 3.4
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1248
            [topology] => 3<sup>9</sup>,4T1
            [link_rcsr] => 
            [in_col] => 10
            [transitivity] => -
            [space_group] => Cmmm
            [pearson] => oS56
            [cn] => 3, 4 (13:1)
            [Year] => 2006
            [cn_sort] => 003-004-013-001-
            [topology_str] => 3<sup>9</sup>,4T1
            [caid] => 320
            [nn] => 1
            [name] => Zigzag carbon(5,5)
            [pressure] => 
            [density] => 
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 75.5
            [shear_mod] => 2.9
            [vicker_hard] => 
            [ref_file] => /References/2006_PhysRev_B_74_214104
            [publ_year] => 2006
            [ref] => 
        )

)
xxx