Which crystal system(s) listed below has (have) the following interaxial angle relationship? a *B + y + 90° O Triclinic О Нехадоnal O Rhombohedral O Orthorhombic O Tetragonal O Monoclinic O cubic

[X-ray diffraction] The first four peaks of the x-ray diffraction pattern for copper is shown below. It was taken usinga monochromatic radiation having a wavelength, λ. Copper has an FCC structure. Answer the following questions.(1) Specify indexes (i.e., (h k l)) for four peaks; peak 1, peak 2, peak 3 and peak 4. (2) The 2θ values for four peaks are given below. Determine the interplanar spacing (dhkl) for peak 1 and peak 2. (3) Determine the atomic radius (R) for peak 1 and peak 2. Use n = 1; λ = 0.1542 nm

Determine the indices for the directions shown in the following cubic unit cell. Part 1 Z We begin with Direction A. (a) What is the x coordinate of the vector tail (x₁)? (b) What is the x coordinate of the vector head (x2)? (c) What is the y coordinate of the vector tail (y₁)? (d) What is the y coordinate of the vector head (y2)? (e) What is the z coordinate of the vector tail (2₁)? (f) What is the z coordinate of the vector head (z₂)? Fractional entries should be expressed in decimal form. H +y

Also what are the indicies for direction A