Physical Chemistry – The Solid State-Concept of Crystals, Crystallography, Inter facial – part-4. Diznr International 10 months ago Physical Chemistry – The Solid State-Concept of Crystals, Crystallography, Inter facial – part-4. https://www.gyanodhan.com/video/3B1.%20Class%2011%20and%2012%20IIT%20NEET/Chemistry/188.%20Physical%20Chemistry%20-%20The%20Solid%20State-Concept%20of%20Crystals%2C%20Crystallography%2C%20Inter%20facial%20-%20part-4.mp4