xxx
Array
(
    [0] => Array
        (
            [id] => 670
            [topology] => atv
            [link_rcsr] => http://rcsr.net/nets/atv
            [in_col] => 2
            [transitivity] => [2685]
            [space_group] => Cmmm
            [pearson] => oS24
            [cn] => 4
            [Year] => 2016
            [cn_sort] => 004-
            [topology_str] => atv
            [caid] => 143
            [nn] => 0
            [name] => G232
            [pressure] => 
            [density] => 3.312
            [e_gap] => 
            [energy] => 0.281
            [bulk_mod] => 400.7
            [shear_mod] => 399.9
            [vicker_hard] => 71.7
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 671
            [topology] => atv
            [link_rcsr] => http://rcsr.net/nets/atv
            [in_col] => 2
            [transitivity] => [2685]
            [space_group] => Cmmm
            [pearson] => oS24
            [cn] => 4
            [Year] => 2016
            [cn_sort] => 004-
            [topology_str] => atv
            [caid] => 143
            [nn] => 1
            [name] => C<sub>ATV</sub>
            [pressure] => 
            [density] => 3.31
            [e_gap] => 3.10
            [energy] => 
            [bulk_mod] => 390.8
            [shear_mod] => 
            [vicker_hard] => 90.3
            [ref_file] => /References/2016_JAppPhys_120_165101
            [publ_year] => 2016
            [ref] => 
        )

    [2] => Array
        (
            [id] => 672
            [topology] => atv
            [link_rcsr] => http://rcsr.net/nets/atv
            [in_col] => 2
            [transitivity] => [2685]
            [space_group] => Cmmm
            [pearson] => oS24
            [cn] => 4
            [Year] => 2016
            [cn_sort] => 004-
            [topology_str] => atv
            [caid] => 143
            [nn] => 2
            [name] => 
            [pressure] => 
            [density] => 
            [e_gap] => 
            [energy] => 
            [bulk_mod] => 
            [shear_mod] => 
            [vicker_hard] => 
            [ref_file] => /References/2017_ChemPhysChem_18_873
            [publ_year] => 2017
            [ref] => 
        )

)
xxx