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Question: question one i explain the difference between a crystalline solid...

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QUESTION ONE (i) Explain the difference between a crystalline solid and an amorphous solid. [2 marks] (ii) Sketch the PXRD pattern for (a) a crystalline solid (b) an amorphous solid. [2 marks] (iii) Explain what is meant by flat, stepped and kinked faces in the Kossel-Hartman-Perdock theory of crystal growth. [4 marks] (iv) A growing crystal face was found to require 6.2 × 10−20 J of energy to add one growth unit to a flat surface of that face growing at 298 K. Calculate the  factor for that crystal face under those conditions (Boltzmann's constant, k, equals 1.38 × 10−23 J K−1). Describe the growth mechanism most likely to be occurring at the face. [6 marks] (v) Describe and sketch the structure of Li3Bi. [3 marks] (vi) Given that Li3Bi has a unit cell of length a Å, calculate the Li-Bi distances in Li3Bi. Express your answers in terms of a.

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