question_answer

Different forms of silica such as quartz, tridymite and cristobalite are as follows: \[\underset{(Si{{O}_{2}})}{\mathop{Quartz}}\,\xrightarrow{870{}^\circ C}\underset{(Si{{O}_{2}})}{\mathop{Tridymite}}\,\underset{(Si{{O}_{2}})}{\mathop{Cristobalite}}\,\]The structure possessed in them is

A) Sheet silicate      

B)                                     Three-dimensional silicate

C) Chain silicate                                            

D) Cyclic or ring silicate