xxx
Array
(
    [0] => Array
        (
            [id] => 1276
            [topology] => mur
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            [transitivity] => [(13)(20)(15)5]
            [space_group] => R-3m
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            [name] => 
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            [e_gap] => 
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            [ref_file] => 
            [publ_year] => 
            [ref] => 
        )

    [1] => Array
        (
            [id] => 1277
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            [ref_file] => /References/PhilMagLetts_78_21_28_1998
            [publ_year] => 
            [ref] => 
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    [2] => Array
        (
            [id] => 1278
            [topology] => mur
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            [name] => Clathrate II+IVb
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            [vicker_hard] => 
            [ref_file] => /References/2011_InorgChem_50_1733_1742_1733
            [publ_year] => 2011
            [ref] => 
        )

)
xxx