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The silicate anion in the mineral kinoit...

The silicate anion in the mineral kinoite is a chain of three `SiO_(4)` tetrahedra, that share corners with adjacent tetrahedra. The charge pof silicate anion is

A

`-4`

B

`-8`

C

`-6`

D

`-2`

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The correct Answer is:
C
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