7 Crystal System - Rhombohedral, Monoclinic, Triclinic | 1Minute Chemistry | SM Sir | #SHORTS

In a triclinic crystal system

The axial angles in triclinic crystal system are

(A) There are seven types of crystal system and 14 types of Bravias lattices. (R) Rhombohedral ,triclinic and hexagonal crystal systems have only primitive unit cell.

Match the crystal system / unit cells mentioned in Column I with their characteristic features mentioned in Column II. Indicate your answer by darkening the appropriate bubbies of the 4xx4 matrix given in the ORS. {:(,"Column I",,"Column II"),((A),"Simple cubic and face - centred cubic",(p),"have these cell parameters a = b = c and " alpha = beta = gamma),((B),"cubic and rhombohedral",(q),"are two crystal systems"),((C ),"cubic and tetragonal",(r ),"have only two crystallography angles of " 90^(@)),((D),"hecagonal monoclinic",(s),"belong to same crystal system"):}

Monoclinic sulphur is an example of monoclinic cystal system. What are the characteristics of the crystal system ?

Match the type of crystal system given in List I with its description given in List II. {:("List I","List II"),("P. Monoclinic",1. a!= b != c " , " alpha != beta != gamma != 90^@),("Q. Tetragonal ", 2.a!= b != c" , " alpha = beta = gamma = 90^@),("R. Triclinic", 3.a!= b != c" , " alpha = gamma = 90^@ " , " beta != 90^@),("S. Rhombic", 4.a = b != c " , " alpha = beta = gamma = 90^@):}