In a cubic unit cell denote the X,Y and Z axes of coordinates and locate the [1,
ID: 1854249 • Letter: I
Question
In a cubic unit cell denote the X,Y and Z axes of coordinates and locate the [1,-11] and [02-3] directions within. Find and denote the Miller indices of the directions shown in the given figure. Find through proper steps the Miller indices of the two planes ABC & ADE given in the figure. Denote within a cubic unit cell the planes (1-11) and (012) A brass alloy has an FCC structure and has 25at.% Zn and 75at.% Cu atoms. What will be the density of this brass? To get the lattice parameter 'a', use the radii of the two atom kinds: rZn=0.133nm; rCu=0.128nm, find the average radius corresponding to the composition 25%Zn and 75%Cu and use it in relevant equation. However, do not average the atomic weights. Use the composition to figure out the masses of atoms. At wts.: Zn-65.41; Cu=63.55. At what angle will a specimen of this brass diffract X-rays of wave length 0. 15418nm from the {220} sets of atomic planes? TiO has the NaCl type crystal structure. Radius of the Ti ion is 0.068 nm, that of O-ionis 0.140 nm. Calculate the atomic packing efficiency in this crystalline material. Calculate the interplanar spacing for the (110} family of planes. Ge has the diamond cubic crystal structure. Its radius is rGe = 0.122 nm. Within a supposed cubic unit cell of Ge: Locate and identify the four inner atoms by their positional parameters. Show one coordination polyhedron around a Ge atom. Show the (1-11) atomic plane within the unit cell. What is the d-spacing of this plane? At what angle will it diffract X-rays of wave length 0.07107nm?Explanation / Answer
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