`Si_(2)O_(7)^(6-)` anion is obtained when:

(Si_2O_5)_n^(2n-) anion is obtained when :

(Si_(2)O_(5))_(n)^(2n-) anion is obtained when:

(Si_(2)O_(5))_(n)^(2n-) anion is obtained when:

Silicon forms a very large number of compounds containing SiO_(4)^(4-) anion as the basic unit. The structure of this basic unit is a tetrahedron in which oxygen atoms are arranged tetrahedral around a silicon atom. The total number of oxygen shared per tetrahedron in Beryl [Be_(3)Al_(2)Si_(6)O_(18)]

Sum of the number of oxygen shared in between two silicon atoms in Si_(3)O_(9)^(6-) and Si_(3)O_(10)^(8-) is:

Sum of the number of oxygen shared in between two silicon atoms in Si_(3)O_(9)^(6-) and Si_(3)O_(10)^(8-) is: