A crystalline solid consists of atoms stacked up in a repeating lattice structur

Question

A crystalline solid consists of atoms stacked up in a repeating lattice structure. Consider a crystal as shown in Figure P1. 1a. The atoms reside at the corners of cubes side L = 0. 250 nm. One piece of evidence for the regular arrangement of atoms comes from the flat surfaces along which a crystal separates, or cleaves, when it is broken. Suppose this crystal cleaves along a face diagonal, as shown in Figure P1. 1b. Calculate the spacing d between two adjacent atomic planes that separate when crystal cleaves. nm

Explanation / Answer

D=LCos45=L/2=0.1768nm

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