Question

Show all needed calculations 1. Tantalum (Ta) is a metal frequently used in electronics (e.g. tantalum capacitors). Tantalum is also highly bioinert and is used as an orthopedic implant material. In a-phase Ta has the cubic A2 (BCC) structure (Fig. 1) and a density of 16.7 g/cm3. Calculate the length of the unit cell edge (in nm)? 2. Soduim Chloride (NaCI) has the cubic B1 (FCC) structure (Fig. 2, shown with Na atom in 0, 0,0 position) with a lattice parameter of 0.564 nm. It contains 4 Na and 4 Cl atoms. A. What are atom positions for all (4 Na and 4 CI) atoms in the unit cell. B. Calculate the planar density of Cl atoms (in atoms/nm') for the following planes: a. (100) b. (110) * Na Fig. 2 Fig. 1

Answer 1

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