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# Problem: Iridium crystallizes in a face-centered cubic unit cell that has an edge length of 3.833 Å. The atom in the center of the face is in contact with the corner atoms, as shown in the drawing.Calculate the atomic radius of an iridium atom.

###### FREE Expert Solution

For a face-centered cubic, the edge length is given by:

$\overline{){\mathbf{a}}{\mathbf{=}}{\mathbf{2}}\sqrt{\mathbf{2}}{\mathbf{r}}}$

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###### Problem Details

Iridium crystallizes in a face-centered cubic unit cell that has an edge length of 3.833 Å. The atom in the center of the face is in contact with the corner atoms, as shown in the drawing.

Calculate the atomic radius of an iridium atom.