Ceylonite

Pleonaste, Queensland, Australia

Ceylonite (first cited 1793) and Pleonaste (first cited 1801) are dingy blue or grey to black varieties of spinel. Ceylonite, apparently named for the island of Ceylon (where it is not known to occur), is a ferroan spinel with Mg:Fe from 3:1 and 1:1, and little or no ferric iron. Pleonaste is named from the Greek for 'abundant,' for its many crystal forms, and is distinguished chemically by low Mg:Fe ratios of approximately 1:3.

Ceylonite and pleonaste are old terms with (apparently) no precise meaning. Nevertheless, both terms are still occasionally used in the current mineralogical literature.

References

• Mindat ceylonite
• Mindat pleonaste

This article about a specific oxide mineral is a stub. You can help Wikipedia by expanding it.v · Categories: Oxide minerals Gemstones Oxide mineral stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем сделать НИР Ch interpreter Koji Igarashi Look at other dictionaries: ceylonite — ⇒CEYLANITE, CEYLONITE, subst. fém. MINÉR. Aluminate naturel de magnésium, variété de spinelle. On appelle (...) ceylonite la [variété] verte (A. PÉRÈS, Les Pierres et les roches, 1896, p. 41). Prononc. Dernière transcr. (ceylanite) ds GATTEL… …   Encyclopédie Universelle ceylonite — Ceylanite Cey lan*ite, n. [F., fr. Ceylan Ceylon.] (Min.) A dingy blue, or grayish black, variety of spinel. It is also called {pleonaste}. [Written also {ceylonite}.] [1913 Webster] …   The Collaborative International Dictionary of English ceylonite — cey·lon·ite …   English syllables Ceylonite — noun a dark colored spinel containing iron • Syn: ↑pleonaste • Hypernyms: ↑spinel …   Useful english dictionary HMS Kingston Ceylonite — Die HMS Kingston Ceylonite war ein britischer Fischtrawler, welcher im Zweiten Weltkrieg von der Royal Navy als behelfsmäßiges U Jagd Fahrzeug eingesetzt wurde. Ursprünglich wurde der Kutter am 6. Februar 1935 auf der Werft von Cook, Welton… …   Deutsch Wikipedia ceylanite — ⇒CEYLANITE, CEYLONITE, subst. fém. MINÉR. Aluminate naturel de magnésium, variété de spinelle. On appelle (...) ceylonite la [variété] verte (A. PÉRÈS, Les Pierres et les roches, 1896, p. 41). Prononc. Dernière transcr. (ceylanite) ds GATTEL… …   Encyclopédie Universelle HMT Bedfordshire — HMT [The abbreviation HMT His Majesty s Trawler identifies the Bedfordshire as a non commissioned ship.] Bedfordshire was an armed anti submarine trawler in the service of the Royal Navy during World War II. She was sunk by the Uboat U 558 on May …   Wikipedia Ceylanite — Cey lan*ite, n. [F., fr. Ceylan Ceylon.] (Min.) A dingy blue, or grayish black, variety of spinel. It is also called {pleonaste}. [Written also {ceylonite}.] [1913 Webster] …   The Collaborative International Dictionary of English pleonaste — Ceylanite Cey lan*ite, n. [F., fr. Ceylan Ceylon.] (Min.) A dingy blue, or grayish black, variety of spinel. It is also called {pleonaste}. [Written also {ceylonite}.] [1913 Webster] …   The Collaborative International Dictionary of English Spinel — General Category Oxide minerals Spinel group Chemical formula MgAl2O4 …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”