The smallest portion of a crystal which has the structural characteristics of the space lattice is called the __________

Which has hcp crystal structure ?

Which has hcp crystal structure ?

The smallest known prokaryotes which lack a cell wall are called.

The smallest segment of a gene which can undergo mutation is called

The defect when an ion occupies an interstitial position in the crystal lattice is called

A ridge like structure called raphe is characteristic of which type of ovules?

The smallest repeating pattern which when repeated in three dimensions results in the crystal of the substance is called

Which of the following crystals have hexagonal structure ?

The regular three dimensional arrangement of points in a crystal is known as crystal lattice and the smallest repeating pattern in the lattice is called unit cell. The unit cells are characterised by the edge lengths a, b, c and the angles between them alpha, beta and gamma respectively. Based on this, there are seven crystal systems. In a cubic unit cell: a=b=c and alpha = beta=gamma=90^(@) The number of points in simple, body centred and face centred cubic cells are 1,2 and 4 respectively In both the hcp and ccp of spheres, the number of tetrahedral voids per sphere is two while the octahedral voids is one. A double triangular void surrounded by three spheres above and three spheres below is called

The cells of the main structural tissue of the body are present in particular spaces called