In cubic, tetragonal and rhombic system of crystal structure, the angle between the edges is _________

In a tetragonal crystal

Rhombic sulphur has the following structure.

The length of two opposite edges of a tetrahedron are 12 and 15 units and the shortest distance between them is 10 units. If the volume of the tetrahedron is 200 cubic units, then the angle between the 2 edges is

In tetragonal crystal system, which of following

For tetragonal crystal, which statement is incorrect ?

Aluminium metal crystallises in a face centred cubic lattice. If crystal radius of aluminium is 144 pm, the edge length of a cube is ____________. pm

Tetragonal crystal system has the unit cell dimensions:

KCl has NaCl type face centred cubic crystal structure and CsF has CsCl type cubic crystal structure. Calculate the ratio of densities of CsF and KCl it is given that the molar mass of CsF is two that of KCl and edge length of KCl unit cell of 1.5 times that for CsF .

Number of crystal systems having only 2 types of bravais lattices = x, number of crystal system having at least two interfacial angles equal = y and number of crystal systems having all the three edge lengths equal = z. Then find the value of x xx y xx z.

Lead sulphide has face centred cubic crystal structure. If the edge length of the unit cell of lead sulphide is 495 pm, calculate the density of the crystal. (at. Wt. Pb =207, S=32)