Types of unit cells

Lattice|Unit cell|Types of unit cell|Types of crystal system

What is true about simple cubic type of unit cells?

Aluminium(a.w=27) crystalises in a cubic unit cell with edge length (a)=100pm, with density 'd'=180g/cm, then type of unit cell is

The cubic unit cell of a metal (molar mass= 63.55 "mol"^(-1) ) has an edge length of 362pm. Its density is 8.92gcm^(-3) . The type of unit cell is

The density of chromium metal is 7.2 g cm^(-3) . If the unit cell is cubic with edge length of 289 pm, determine the type of unit cell (simple , body centred or face centred) [Atomic mass of Cr = 52 a.m.u., N_A = 6.02 xx 10^(23) mol^(-1)] .

S_(1) : Cubic system have four possible type of unit cells S_(2) : H_(2)O is diamagnetic substance and it is weakly attracted in magnetic fields S_(3) : Graphite is a covalent solid with vanderwaal's forces as well

With the help of given values of ionic radii answer the following questions : (a)What would be coordination number of Mg in MgO ? (b)What type of unit cell is given by CsBr ? (c )Can we substitute Cl^- from Nacl by Br^- and I^- ions without changing the coordination system ? (d)What type of voids are present in Na_2S ? (e)What would be the maximum radii of that ion which can fit into site occupied by F^- in KF ?

Why an end-centred unit cell cannot he cubic? What is the highest possible symmetry for this type of unit cell?