Question

What is the general structure and some properties of crystals?

Answer 1

The general structure of a crystal is that atoms are periodically arrayed characterized by their unit cells in which the smallest asymmetric unit can be described.

The easiest way to discribe one important property of crystals is their thermal stability. So lets talk about chocolate. Yes chocolate is in fact a crystal when we are eating it. It is however known there exist 6 forms of chocolate crystals (polymorphs). Based on the preparation of the chocolate (low cooling, fast cooling, fast heating, slow heating ect.), it is possible for the chocolate to possess different crystal structures in which 1 of the structures has a melting temperature of 17 degrees C while one of the most thermal stabile versions melt at 37 degrees C. So as you can see the crystal structure has indeed microscopical properties.

Answer 2

macroscopical properties*

Answer 3

Wow spot on!