basic unit of silicate
Answers
The basic structural unit of silicates is SiO⁴⁻₄
It is a tetrahedral unit. Si atom is sp^3 hybridized and forms four covalent bonds with 4 oxygen atoms.
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The basic building block of all silicate minerals is the [SiO4]4- tetrahedron can form single and double chains and sheets.
Silicate minerals containing chains are termed inosilicates. In single chains (SiO32−)n, the silicon to oxygen ratio is 1:3, while in double chains (Si4O116−)n, the silicon to oxygen ratio is 4:11.
Key Terms
Inosilicates: Inosilicates, or chain silicates, have interlocking chains of silicate tetrahedrons.
Silicate: A silicate (SiO44-) is a compound containing a silicon-bearing anion.
Phyllosilicates: Sheet silicate minerals, formed by parallel sheets of silicate tetrahedrons Si2O52-.
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