xxx
Array
(
    [0] => Array
        (
            [id] => 1175
            [topology] => 3<sup>6</sup>,4<sup>2</sup>T12
            [link_rcsr] => 
            [in_col] => 3
            [transitivity] => [8(11)84]
            [space_group] => P63/mmc
            [pearson] => hP122
            [cn] => 2, 3, 4 (1:3:1)
            [Year] => 2009
            [cn_sort] => 002-003-004-001-003-001-
            [topology_str] => 3<sup>6</sup>,4<sup>2</sup>T12
            [sp_atoms] => +
            [caid] => 290
            [nn] => 0
            [name] => 
            [pressure] => 
            [density] => 0.493
            [e_gap] => 
            [energy] => 0.634
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1176
            [topology] => 3<sup>6</sup>,4<sup>2</sup>T12
            [link_rcsr] => 
            [in_col] => 3
            [transitivity] => [8(11)84]
            [space_group] => P63/mmc
            [pearson] => hP122
            [cn] => 2, 3, 4 (1:3:1)
            [Year] => 2009
            [cn_sort] => 002-003-004-001-003-001-
            [topology_str] => 3<sup>6</sup>,4<sup>2</sup>T12
            [sp_atoms] => +
            [caid] => 290
            [nn] => 1
            [name] => 
            [pressure] => 
            [density] => 0.45
            [e_gap] => 1.95
            [energy] => 
            [bulk_mod] => 162.2
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2009_ChemPhysLett_473_108
            [publ_year] => 2009
            [ref] => 
        )

    [2] => Array
        (
            [id] => 1177
            [topology] => 3<sup>6</sup>,4<sup>2</sup>T12
            [link_rcsr] => 
            [in_col] => 3
            [transitivity] => [8(11)84]
            [space_group] => P63/mmc
            [pearson] => hP122
            [cn] => 2, 3, 4 (1:3:1)
            [Year] => 2009
            [cn_sort] => 002-003-004-001-003-001-
            [topology_str] => 3<sup>6</sup>,4<sup>2</sup>T12
            [sp_atoms] => +
            [caid] => 290
            [nn] => 2
            [name] => 
            [pressure] => 
            [density] => 0.45
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 162.2
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2010_JSuperhardMat_32_67
            [publ_year] => 2010
            [ref] => 
        )

)
xxx