出典:Wiktionary
出典:『Wiktionary』 (2026/01/04 20:52 UTC 版)
From Montmorillon + -ite, after where it was identified.
montmorillonite (countable and uncountable, plural montmorillonites)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/14 12:49 UTC 版)
Montmorillonite is a very soft phyllosilicate group of minerals that typically form in microscopic crystals, forming a clay. It is named after Montmorillon in France. Montmorillonite, a member of the smectite family, is a 2:1 clay, meaning that it has 2 tetrahedral sheets sandwiching a central octahedral sheet. The particles are plate-shaped with an average diameter of approximately one micrometre. Members of this group include saponite.