Scandium (Sc) has the Face-Centered Cubic (FCC) crystal structure. The edge length is a = 0.452 nm. What is the linear density in atoms/nm along direction [110]?

a: Sketch within a cubic unit cell the following crystallographic directions: [121], [201], [2 1 3), [111] [121] hi Dats JD fall

( 100] Problem 4. Calculate a value for the density of FCC platinum in grams per cubic centimeter from its lattice constant a of 0.36263 nm and its atomic mass of 195.09 g/mol. (pts 15)

Draw a sketch of the (111) plane of the FCC unit cell. Are these atoms close packed? Draw a sketch of the close packed plane in hexagonal close packed. It will be simply an atom surrounded by 6 others in the plane.

Answer the following question with drawing the atom configurations of the plane or direction.What is the planar density for the (110) plane in a FCC structure?

Question #2/ A: Discuss the twin boundaries defects formation reasons? B: Sketch the plane (020)? Question #3/ Find the planer density (PD) in (atom/mm?) of (100) in a face centered cubic unit cell with lattice constant of 3.5 Å, and determined the atomic radius?

Sodium chloride (NaCl) has the rock salt crystal structure and a density of 2.17 g/cm³. The atomic weights of sodium and chlorine are 22.99 g/mol and 35.45 g/mol, respectively. (a) Determine the unit cell edge length. nm (b) Determine the unit cell edge length from the radii in the table below assuming that the Nat and Cl- ions just touch each other along the edges. nm Cation Mg2+ Fe2+ Na+ Ionic Radius (nm) 0.072 0.077 0.102 Anion Ionic Radius (nm) CI- 0²- 0.181 0.140

prove the interplanar spacing of the cubic crystal structure (primitive) [prove the distance in cubic]

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Sketch the planar cross section for the following planes in the FCC structure (label the edge lengths in terms of a and R) and calculate the planar densities for the three planes (do so in terms of both atoms/nm2 AND the dimensionless quantity): a. (001)b. (011)c. (111)