In a matallic crystal the .

Tourmaline is a hexagonal crystal. The longest diagonal of the crystal is known as______ [Fill in the blank.]

Crystals can be classified into …. basic crystal lattices.

The addition of a CaCl_(2) crystal to a KCl crystal

In an ionic crystal, Schottky defect decreases the density of the crystal but Frenkel defect does not cause any change in density of the crystal. Explain.

For a transparent crystal, the critical angle is 30^@ .What will be the value of polarising angle for that crystal?

Identify the crystal Write the name of the crystal.

The addition of CaCl_(2) crystal to KCl crystal a. Lowers the density of the KCl crystal b. Raises the density of the KCl crystal c. Does not affect the density of the KCl crystal d. Increases the Frenkel defects of the KCl crystal