SOLVED:What are some of the structural differences between quartz and amorphous SiO2 ?
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SOLVED:Amorphous silica, SiO2, has a density of about 2.2  g / cm^3, whereas the density of crystalline quartz, another form of SiO2, is 2.65  g / cm^3. Which of the following statements is the best explanation for the difference in density? (a) Amorphous silica is a network-covalent solid, but quartz is metallic. (b) Amorphous silica crystallizes in a primitive cubic lattice. (c) Quartz is harder than amorphous silica. (d) Quartz must have a larger unit cell than amorphous silica. (e) The atoms
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