Chemistry - Complete Pblock- Question with Solution | TestHub

The different allotropic forms of sulphur arises partly from the extent to which $S$ has polymerised and partly from the crystal structures adopted. The two common crystalline forms are $\alpha$ or rhombic sulphur and $\beta$ or monoclinic sulphur. A third modification is $\gamma$-monoclinic sulphur. All three forms contain puckered $S_8$ rings with a crown conformation. Engel's sulphur ( $\epsilon$-sulphur) contains $S_6$ rings. ${\mathrm{S}}_7,{\mathrm{S}}_9,{\mathrm{S}}_{10},{\mathrm{S}}_{11},{\mathrm{S}}_{12},{\mathrm{S}}_{18}$ and ${\mathrm{S}}_{20}$ rings have been made by Schmidt and his group. Plastic or $\gamma$-sulphur contains spiral chains and sometimes ${\mathrm{S}}_8$ and other rings. The other allotropic forms of sulphur are milk of sulphur and colloidal or $\delta$-sulphur.