Which is the stable form of silica between 1470°C and the melting point 1713°C ?
Correct answer: A. Cristobalite
- A. Cristobalite
- B. Tridymite
- C. Quartz
- D. None of these
Explanation
Silica undergoes the tridymite-to-cristobalite transformation at about 1470°C, so cristobalite is the stable polymorph from 1470°C up to its melting point near 1713°C.
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