Example of unit cell with crystallographic dimensions a≠b≠c,α=γ=90o,β≠90o is

In Monoclinic crystal system a ≠ b ≠ c  α = γ = 900  β ≠ 900Monoclinic Sulphur is an example of monoclinic crystal system.Rhombic sulphur is an example of orthorhombic crystal system.calcite is an example of rhombohedral or trigonal crystal system.Graphite is an example of hexagonal crystal system.