A metal has a radius of 0.153 nm, and a planar density of 7.5516551453132 nm-2 in the (110) plane. What is the crystal structure of the material?   a. Something else; atomic radius 0.153 nm b. BCC with atomic radius 0.153 nm c. FCC with atomic radius 0.153 nm d. HCP  with atomic radius 0.153 nm

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Q: Pls help on both questions.

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Q: d. (131)

A:

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Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.