. Assertion Graphite is an example of tetragonal crystal system.
Reason For a tetragonal system, a = b ¹ c, a=b-90°, g =120°
Solution ||| Like quartz and ice, graphite is an example of hexagonal system for this a=b-90° and g =120° and a = b ¹ c.
For a tetragonal system a, b= g =90° and a = b ¹ c.
So, both the statements are false.