GENERAL GEOLOGY

Detailed explanation-1: -Monoclinic systems have point symmetry of 2, m, or 2/m, all of which require two of the unit cell axes to be oriented at right angles to the third axis in order for a two-fold rotation or mirror to be compatible with the translational symmetry of the lattice.

Detailed explanation-2: -monoclinic system, one of the structural categories to which crystalline solids can be assigned. Crystals in this system are referred to three axes of unequal lengths-say, a, b, and c-of which a is perpendicular to b and c, but b and c are not perpendicular to each other.

Detailed explanation-3: -There are six (6) elements of symmetry in crystals: a Center of Symmetry, an Axis of Symmetry, a Plane of Symmetry, an Axis of Rotatory Inversion, a Screw-axis of Symmetry, and a Glide-plane of Symmetry.

Detailed explanation-4: -The elements of symmetry in a crystal are plane of symmetry, axis of symmetry and centre of symmetry. A cubic crystal has maximum symmetry. Plane of symmetry is that imaginary plane which passes through the centre of the crystal and divides it into two equal portions (just mirror images of each other).