Question: Metallic iron at 20C is studied by the Bragg method, in which the crystal is oriented so that a reflection is obtained from the

Metallic iron at 20C is studied by the Bragg method, in which

Metallic iron at 20C is studied by the Bragg method, in which the crystal is oriented so that a reflection is obtained from the planes parallel to the sides of the cubic crystal, then from planes cutting diagonally through opposite edges, and finally from planes cutting diagonally through opposite corners. Reflections are first obtained at 0 =11 36', 83', and 2026', respectively. What type of cubic lattice does iron have at 20C b.) Metallic iron also forms cubic crystals at 1110C, but the reflections determined as described in (a) occur at 0 = 98', 12-57' and 7-55' respectively. What type of cubic lattice does iron have at 1110 C? c.) the density of iron at 20C is 7.86g/cm. What is the length of the side of the unit cell at 20c d.) What is the wavelength of the X-rays used? e.) What is the density of iron at 1100C?

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