Platinum metal crystallizes in a face-centered cubic lattice with one atom per lattice point. Monochromatic X-radiation from a Mo target has a wavelength of 71.07pm. If this radiation is used in a diffraction experiment with a platinum crystal, a secood order diffracted beam is observed at a theta value of 10.A3 : If the spacing between these planes cotrespoods to the unit cell length ( d=a ), what is the d.spacing between the planes that gave rise to this refiection? What is the metallic radius of a platinum atom? d-spacing=radius=pmpm