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<p>atmosphere of the synthetic environment.[6]</p>

<p><big>Oxidation states of copper and sulfur</big></p>
<p>The bonding in copper sulfides cannot be correctly described in terms of a simple oxidation state formalism because the Cu-S bonds are somewhat <a href="page.php?w=covalent">covalent</a> rather than <a href="page.php?w=Ionic_bond">ionic</a> in character, and have a high degree of <a href="page.php?w=delocalization">delocalization</a> resulting in complicated <a href="page.php?w=electronic_band_structure">electronic band structure</a>s. Although</p><p>
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