xenotime

xenotime

      widely distributed phosphate mineral, yttrium phosphate (YPO4), though large proportions of erbium commonly replace yttrium), that occurs as brown, glassy crystals, crystal aggregates, or rosettes in igneous rocks and associated pegmatites, in quartzose and micaceous gneiss, and commonly in detrital material. Occurrences include Norway, Sweden, Madagascar, Brazil, and North Carolina. The name is from the Greek word meaning “vain honour,” because the yttrium in xenotime was mistakenly thought to be a new element. For detailed physical properties, see phosphate mineral (table).

* * *


Universalium. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Xénotime — Catégorie VIII : phosphates, arséniates, vanadates[1] Xénotime du Brésil …   Wikipédia en Français

  • XÉNOTIME — Essentiellement constitué par du phosphate d’yttrium, de formule (YPO4), le xénotime peut renfermer parfois de l’erbium et d’autres lanthanides (cérium, lanthane, scandium...) qui se substituent à l’yttrium dans la structure cristalline. Le… …   Encyclopédie Universelle

  • Xenotime — Xénotime Catégorie VIII : phosphates, arséniates, vanadates Formule brute YPO4 Identification Couleur jaunâtre à brunâtre, aussi grisâtre …   Wikipédia en Français

  • Xenotime — Xen o*time, n. [Gr. ? honoring guests or strangers; xe nos guest, stranger + ? honor: cf. G. xenotim.] (Min.) A native phosphate of yttrium occurring in yellowish brown tetragonal crystals. [1913 Webster] …   The Collaborative International Dictionary of English

  • Xenotime — Infobox mineral name = Xenotime boxwidth = caption = Xenotime from the Poços de Caldas alkaline massif, Brazil formula = YPO4 color = Brown, brownish yellow, gray habit = Prismatic, aggregate, granular system = Tetragonal cleavage = Perfect, two… …   Wikipedia

  • xenotime — ksenotimas statusas T sritis chemija apibrėžtis Mineralas. formulė Y[PO₄] atitikmenys: angl. xenotime rus. ксенотим …   Chemijos terminų aiškinamasis žodynas

  • xenotime — noun A yellow brown mineral, yttrium phosphate (YPO) …   Wiktionary

  • xenotime — xen·o·time …   English syllables

  • xenotime — /ˈzɛnətaɪm/ (say zenuhtuym) noun a mineral, yttrium phosphate, YPO4, often containing cerium, erbium, and thorium, of which it is a source. {French, as if from Greek xenos strange + timē honour; apparently an error for kenotime (Greek kenos empty …  

  • xenotime — noun a brown to yellow mineral that is a phosphate of yttrium in crystalline form • Hypernyms: ↑mineral • Substance Meronyms: ↑thulium, ↑Tm, ↑atomic number 69, ↑ytterbium, ↑Yb, ↑atomic number 70, ↑ …   Useful english dictionary

Share the article and excerpts

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