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出典:Wiktionary
出典:『Wiktionary』 (2026/07/13 16:40 UTC 版)
Named for type locality Mull (Scotland) + -ite.
mullite (countable and uncountable, plural mullites)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/05 08:32 UTC 版)
Mullite or porcelainite is a rare silicate mineral of post-clay genesis. It can form two stoichiometric forms 3Al2O32SiO2 or 2Al2O3 SiO2. Unusually, mullite has no charge balancing cations present therefore there are three different Al sites: two distorted tetrahedral Al sites and one Al other site which adopts a higher co-ordinate octahedral state.