Iridium atom radius
The very dense metal iridium has a face-centered cubic unit cell and a density of 22.56 g/cm3. Use this information to calculate the radius of an atom of the element.
Please provide detailed explanation.
Thanks!
© BrainMass Inc. brainmass.com October 10, 2019, 6:02 am ad1c9bdddfhttps://brainmass.com/chemistry/general-chemistry/iridium-atom-radius-526414
Solution Preview
The radius of an atom can be calculated using the crystal lattice information and density. Ir has fcc lattice. This means that there are 4 atoms of Ir in one unit cell. So the density corresponds to the weight of 4 atoms of Ir that occupies the volume of a unit cell. Fcc lattice unit cells are cubes.
The volume of a cube = a^3. Now for fcc, the cell edge 'a' is related to the radius of the atom 'r' by the ...
Solution Summary
The radius of a face-centered cube is calculated from given data.
$2.19