Name the structure of silicate in which three oxygen atoms of [SiO4]4− are shared :
A
pyrosilicate.
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B
sheet silicate.
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C
linear chain silicate.
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D
three dimensional silicate.
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Solution
The correct option is B sheet silicate.
Two dimensioanl sheet silicates: In such silicates, three oxygen atoms of each tetrahedral are shared with adjacent SiO4−4 tetrahedral, such sharing forms two dimensional sheet strtucre with general formula (Si2O5)2n−n
Ex. Talc Mg(Si2O5)2Mg(OH)2
The structure of silicates has been found with the help of X-ray diffraction techniques.