monazite

monazite
/mon"euh zuyt'/, n.
a reddish- or yellowish-brown mineral, a phosphate of cerium and lanthanum, (Ce,La)PO4: the principal ore of thorium.
[1830-40; < G Monazit, equiv. to monaz- ( < Gk monázein to be alone; see MON-) + -it -ITE1]

* * *

      phosphate mineral, cerium and lanthanum phosphate [(Ce, La)PO4], that is the major commercial source of cerium. Occurring as small, brown, resinous, rather heavy crystals in granitic and gneissic rocks and their detritus (called monazite sands), monazite frequently contains 10–12 percent thorium dioxide (ThO2) and thus represents a major commercial source of thorium as well. Monazite is mined in Brazil, Norway, Madagascar, Sri Lanka, India, and North Carolina. For detailed physical properties, see phosphate mineral (table).

* * *


Universalium. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Monazite — General Category Phosphate minerals Chemical formula (Ce,La)PO …   Wikipedia

  • Monazite — Catégorie VIII : phosphates, arséniates, vanadates[1] Monazite de Norvège …   Wikipédia en Français

  • monazite — [ mɔnazit ] n. f. • 1874; all. Monazit (1829), du gr. monazein « être seul, rare » ♦ Minér. Phosphate naturel de cérium et d autres terres rares (lanthane, thorium). La monazite est le minerai principal du thorium. ● monazite nom féminin… …   Encyclopédie Universelle

  • Monazite — Mon a*zite (m[o^]n [.a]*z[imac]t), n. [From Gr. mona zein to be solitary, in allusion to its isolated crystals.] (Min.) A mineral occurring usually in small isolated crystals, a phosphate of the cerium metals. [1913 Webster] …   The Collaborative International Dictionary of English

  • monazite — s. f. [Mineralogia] Areia brasileira que se emprega no fabrico das mangas de incandescência e que provém da decomposição de um mineral encontrado nas areias amarelas. = MONAZITA   ♦ Grafia no Brasil: monazita …   Dicionário da Língua Portuguesa

  • monazite — [män′ə zīt΄] n. [Ger monazit < Gr monazein, to be alone (see MONASTERY) + Ger it, ITE1: so named because of its isolated crystals] a yellow or brownish red native phosphate of the rare earth elements, a major source of thorium, cerium,… …   English World dictionary

  • Monazite — Monazit Chemische Formel siehe Einzelminerale Mineralklasse Phosphate, Arsenate, Vanadate 8.AD.50 (8. Aufl.: VII/A.15 (Monazit Gruppe)) (nach Strunz) 38.4.3 (Monazit Gruppe) (nach Dan …   Deutsch Wikipedia

  • monazite — monacitas statusas T sritis chemija apibrėžtis Mineralas. formulė (Ce,La,Nd,Th)[PO₄] atitikmenys: angl. monazite rus. монацит …   Chemijos terminų aiškinamasis žodynas

  • monazite — noun Etymology: German Monazit, from Greek monazein Date: 1836 a yellow to red or brown mineral that is a phosphate of thorium and various rare earth elements and occurs especially in sand and gravel deposits …   New Collegiate Dictionary

  • monazite — noun any of a range of reddish brown minerals that are mixed phosphates of the lighter rare earth elements lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium and yt …   Wiktionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”