Mandarin:
方硅石

Explanation in English Language (EN):
A high-temperature polymorph of silica (SiO₂), found in ceramics and refractory materials. It has a different crystal structure from quartz and affects thermal expansion.

Explanation in Mandarin (ZH):
二氧化硅（SiO₂）在高温下的同质异形体，常见于陶瓷和耐火材料中，其晶体结构不同于石英，会影响热膨胀性能。

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International Phonetic Alphabet (IPA)
- Definition: A standardized system of symbols used to represent the sounds of spoken language.
- Purpose: Helps linguists, language learners, and educators accurately describe pronunciation across languages.
- Example: The word “hello” in British English is transcribed as /həˈləʊ/ in IPA.