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单词 aenigmatite
释义

aenigmatite

/ɪˈnɪɡmətʌɪt/
(also enigmatite) Mineralogy
noun
A titanium-containing mineral occurring as long prismatic crystals of a black or dark brown colour, typically as a constituent of pegmatites.
  • Aenigmatite is a titanate and silicate of sodium and ferrous iron, Na2Fe ii 5TiSi6O20. Crystal system: triclinic..

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From German Ainigmatit from ancient Greek αἴνιγμα (with reference to its originally problematic nature) + German -it.

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更新时间:2025/2/23 1:42:01