2 questions, referencing following the Chicago 17th B guideline. Incorporate 1/2

2 questions, referencing following the Chicago 17th B guideline. Incorporate 1/2 relatable pictures/diagrams if possible. Word count doesnt include referencing.
First question: 650 words.
Question 1. What are solid solutions? How are they formed in minerals? Using an example, describe how the existence of solid solutions determines the composition of minerals? From mineralogy point of view, discuss the processing implications of solid solutions?
Second question: 1050 words.
Question 2. Explain why X-ray diffraction (XRD) is very important as a complimentary tool for process mineralogy. Why would you use this technique and not just rely upon geological logs and interpretations? Use all means to find information about this technique and the theories behind it. Find out where this form of analysis is most frequently used within a plant based environment.