xxx
Array
(
    [0] => Array
        (
            [id] => 821
            [topology] => 3<sup>2</sup>,4T191
            [link_rcsr] => 
            [in_col] => 3
            [transitivity] => [3752]
            [space_group] => Cmcm
            [pearson] => oS24
            [cn] => 3, 4 (2:1)
            [Year] => 2011
            [cn_sort] => 003-004-002-001-
            [topology_str] => 3<sup>2</sup>,4T191
            [caid] => 184
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 2.952
            [e_gap] => 
            [energy] => 0.805
            [bulk_mod] => 292.4
            [shear_mod] => 199.3
            [vicker_hard] => 23.0
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 822
            [topology] => 3<sup>2</sup>,4T191
            [link_rcsr] => 
            [in_col] => 3
            [transitivity] => [3752]
            [space_group] => Cmcm
            [pearson] => oS24
            [cn] => 3, 4 (2:1)
            [Year] => 2011
            [cn_sort] => 003-004-002-001-
            [topology_str] => 3<sup>2</sup>,4T191
            [caid] => 184
            [nn] => 1
            [name] => 3D-(7,0)
            [pressure] => 
            [density] => 3.020
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 273.9
            [shear_mod] => 201.6
            [vicker_hard] => 49.8
            [ref_file] => /References/2011_ACSNano_7226
            [publ_year] => 2011
            [ref] => 
        )

)
xxx