7. Zirconium oxide can be described as an FCC arrangement of zirconium ions with all the tetrahedral interstices filled with oxygen ions. (a) Draw the unit cell in the cube below. (0.5 point) (b) Why is the chemical formula ZrO$_2$? (0.5 point)
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Step 1: Mark the zirconium ions at every corner of the cube and at the center of every face (this is the FCC lattice of Zr). Show more…
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Rutile is a mineral composed of $\mathrm{Ti}$ and $\mathrm{O}$. Its unit cell, shown in the drawing, contains $T$ atoms at each corner and a Ti atom at the center of the cell. Four $\mathrm{O}$ atoms are on the opposite faces of the cell, and two are entirely within the cell. (a) What is the chemical formula of this mineral? (b) What is the nature of the bonding that holds the solid together? (c) What is the coordination number of each atom?
Rutile is a mineral composed of Ti and O. Its unit cell, shown in the drawing, contains Ti atoms at each corner and a Ti atom at the center of the cell. Four $\mathrm{O}$ atoms are on the opposite faces of the cell, and two are entirely within the cell. (a) What is the chemical formula of this mineral? (b) What is the coordination number of each atom?
Explain why the ceramic zirconium oxide has the formula: ZrO2.
Sri K.
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