xxx
Array
(
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        (
            [id] => 853
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            [nn] => 0
            [name] => 
            [pressure] => 
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            [energy] => 1.267
            [bulk_mod] => 91.2
            [shear_mod] => 60.5
            [vicker_hard] => 6.9
            [ref_file] => 
            [publ_year] => 
            [ref] => 
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    [1] => Array
        (
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            [cn_sort] => 003-004-006-001-
            [topology_str] => 3<sup>2</sup>,4T202
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            [name] => AHD C28 (2-fold)
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            [energy] => 
            [bulk_mod] => 122.8
            [shear_mod] => 
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            [ref] => 
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    [2] => Array
        (
            [id] => 855
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            [pearson] => cP56
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            [bulk_mod] => 122.8
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            [ref_file] => /References/2010_JSuperhardMat_32_67
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            [ref] => 
        )

)
xxx