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- 3.36Point Coordinates, Crystallographic Directions, and Crystallographic Planes 5. List the point indices of the titanium, barium, and oxygen ions for a unit cell of the perovskite crystal structure. (. 0²3.60 (a) What are the direction indices for a vec- 231 in a 342 11 tor that passes from point 10 to point 32 tetragonal unit cell? (b) Repeat part (a) for a rhombohedral unit cell.
- Q#01. Answer the followings: (a) Distinguish between the coordination number and number of atoms per unit cell. Find out packing fraction for: (i) Simple cubic, (ii) body centered and face centered cubic unit cells. (b) Sketch the salient features of diamond structure (c) Find the total numbe of symmetry elements in each of the fourteen Bravais lattice3Verify that the lowest value of the radius ratio for (a) sixfold coordination is 0.414, and (b) for eightfold coordination is 0.732.
- 9) A Cu monocrystal (FCC) of 10 cm length is pulled in tension. The stress axis is [¯123].a) Which is the stress system with the highest resolved shear stress?(b) If the extension of the crystal continues until a second slip systembecomes operational, what will this system be?(c) What rotation will be required to activate the second system?(d) How much longitudinal strain is required to activate the second system?By describing the relationship between subcooling (DT) and the critical radius, we can explain the possible microstructures. discuss.Sketch portions of a linear polypropylene molecule that are (a) syndiotactic, (b)atactic, and (c) isotactic. Use two-dimensional schematics.
- Kindly answer question a, b & cI need the answer in HandwrittenA unit cell has a=5Å, b=5Å, c-8Å, a=90°, B-90° ad y=90°. What will be the Bravais lattice for this unit cell? Mention the following for each of the given crystallographic cubic planes. (a) Intercepts in the x, y and z coordinates (b) Reciprocals (c) Final index of the crystal plane 1/2