ZnS follows a zinc blende structure while FeO follows a rock salt...

13. Liquids, Solids & Intermolecular Forces

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FeO (rock salt structure) has a higher coordination number, which leads to a higher melting point.

FeO (rock salt structure) has a lower coordination number, which leads to a higher melting point.

ZnS follows a zinc blende structure while FeO follows a rock salt structure. Using coordination numbers, explain why FeO has a higher melting point than ZnS.