xxx
Array
(
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        (
            [id] => 1239
            [topology] => 4<sup>10</sup>T5
            [link_rcsr] => 
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            [transitivity] => [(10)(19)(14)4]
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            [cn] => 4
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            [shear_mod] => 335.5
            [vicker_hard] => 62.8
            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
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            [cn_sort] => 004-
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            [ref_file] => /References/2013_JChemPhys138_164703_KelvinC
            [publ_year] => 2013
            [ref] => 
        )

)
xxx