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14-02-2020
Chemistry

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Cuprite, Cu2O, has a body-centered cubic unit cell of oxide anions with four copper cations in a tetrahedral arrangement around the body center oxide. Draw the unit cell in the empty cube. What is the coordination number and shape around the copper cations, and what is the charge on copper? Do the same analysis for the oxide anions.

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16-02-2020

Answer: The coordination number of Cu+ is two while the coordination number of O2- is 4

Explanation:

The coordination number of an ion in a unit cell arrangement refers to the number of immediate neighboring ions of opposite charge surrounding a particular ion. In Cu2O, the charge on Cu is +1 and the charge on the oxide ion is -2. Each copper I ion is surrounded by two oxide ions while each oxide ion is surrounded by four copper I ions in each unit cell.

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