xxx
Array
(
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        (
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            [transitivity] => [2465]
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            [pearson] => tP16
            [cn] => 3, 4 (1:1)
            [Year] => 2004
            [cn_sort] => 003-004-001-001-
            [topology_str] => sqc6952
            [caid] => 133
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            [name] => 
            [pressure] => 
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            [shear_mod] => 197.6
            [vicker_hard] => 23.8
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            [publ_year] => 
            [ref] => 
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            [nn] => 1
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            [ref_file] => /References/2004_JPhysCondMat_16_9083
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            [ref] => 
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    [2] => Array
        (
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            [cn_sort] => 003-004-001-001-
            [topology_str] => sqc6952
            [caid] => 133
            [nn] => 2
            [name] => 3D(4,0)-II
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            [density] => 
            [e_gap] => Metal
            [energy] => 
            [bulk_mod] => 267.52
            [shear_mod] => 190.54
            [vicker_hard] => 47.9
            [ref_file] => /References/2013_ScientificReports_3_1331
            [publ_year] => 2013
            [ref] => 
        )

)
xxx