Definition of nontronite in English:

nontronite

noun ˈnɒntrənʌɪt

Mineralogy

A pale yellow or greenish crystalline clay mineral, Na₀.₃₃Fe₂ 3+(Si,Al)₄O₁₀(OH)₂, belonging to the smectite or montmorillonite group and sometimes resembling opal.

Origin

Mid 19th century; earliest use found in Charles Shepard (1804–1886). From French nontronite from Nontron, the name of the town in Dordogne, France, where the mineral was first found + -ite.

Definition of nontronite in US English:

nontronite

nounˈnɒntrənʌɪt

Mineralogy

A pale yellow or greenish crystalline clay mineral, Na₀.₃₃Fe₂ 3+(Si,Al)₄O₁₀(OH)₂, belonging to the smectite or montmorillonite group and sometimes resembling opal.

Origin

Mid 19th century; earliest use found in Charles Shepard (1804–1886). From French nontronite from Nontron, the name of the town in Dordogne, France, where the mineral was first found + -ite.

单词	nontronite
释义	Definition of nontronite in English: nontronite noun ˈnɒntrənʌɪt Mineralogy A pale yellow or greenish crystalline clay mineral, Na₀.₃₃Fe₂ 3+(Si,Al)₄O₁₀(OH)₂, belonging to the smectite or montmorillonite group and sometimes resembling opal. Origin Mid 19th century; earliest use found in Charles Shepard (1804–1886). From French nontronite from Nontron, the name of the town in Dordogne, France, where the mineral was first found + -ite. Definition of nontronite in US English: nontronite nounˈnɒntrənʌɪt Mineralogy A pale yellow or greenish crystalline clay mineral, Na₀.₃₃Fe₂ 3+(Si,Al)₄O₁₀(OH)₂, belonging to the smectite or montmorillonite group and sometimes resembling opal. Origin Mid 19th century; earliest use found in Charles Shepard (1804–1886). From French nontronite from Nontron, the name of the town in Dordogne, France, where the mineral was first found + -ite.
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