Thomasclarkite

Thomasclarkite

Infobox mineral
name = Thomasclarkite-(Y)
category = Mineral
boxwidth =
boxbgcolor =


caption =
formula = (Na,Ce)(Y,REE)(HCO3)(OH)3·4(H2O)
molweight = 375.77 gm
color = White, Yellow
habit = Blocky crystals pseudo-tetragonal
system = Monoclinic - Sphenoidal
twinning = Common on (101)
cleavage = [010] Perfect, [101] Parting
fracture = Brittle - Uneven - Very brittle fracture producing uneven fragments
mohs = 2-3
luster = Vitreous (Glassy)
refractive = α= 1.40, β= 1.540, γ= 1.540
opticalprop = pseudouniaxial negative 2V(meas.) = 5°
birefringence = δ = 0.140
pleochroism =
streak = white
gravity = 2.30
melt =
fusibility =
diagnostic =
solubility =
diaphaneity = Translucent to transparent
other = Radioactivity 770 Bq/g

Thomasclarkite-(Y) is a very rare mineral which was known as UK-93 until 1997, when it was renamed in honour of Dr. Thomas H. Clark (1893-1996), McGill University professor. The mineral is one of many rare earth element minerals from Mont Saint-Hilaire. Rare occurrence in an alkalic pegmatite dike in an intrusive gabbro-nepheline syenite.

ee also

*List of minerals
*List of minerals named after people

References

* [http://webmineral.com/data/Thomasclarkite-(Y).shtml Webmineral]
* [http://www.saint-hilaire.ca/en/thomas.htm Mont Saint-Hilaire]
* [http://www.mindat.org/min-7336.html Mindat with location data]
* [http://rruff.geo.arizona.edu/doclib/hom/thomasclarkitey.pdf Mineral Data Publishing]


Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • List of minerals S-T (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia

  • List of Canadians — This is a list of Canadians, people born in Canada, or who became citizens of Canada, grouped by their area of notability. This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by… …   Wikipedia

  • List of minerals — This is a List of minerals for which there are Wikipedia articles. Mineral variety names and mineraloids are to be listed after the valid minerals for each letter.For a complete listing (about 4,000) of all mineral names: List of minerals… …   Wikipedia

  • List of Harvard University people — The list of Harvard University people includes notable graduates, professors and administrators affiliated with Harvard University. For a list of notable non graduates of Harvard, see notable non graduate alumni of Harvard. For a list of Harvard… …   Wikipedia

  • List of McGill University people — The following is a list of chancellors, principals, and noted alumni and professors of McGill University in Montreal, Quebec, Canada. List of Chancellors # Charles Dewey Day (1864 1884) cite web|url=http://www.archives.mcgill.ca/resources/guide/vo… …   Wikipedia

  • List of minerals named after people — This is a list of minerals named after people. The chemical composition follows name when available.: For other lists of eponyms (names derived from people) see Lists of etymologies. : For a list of eponyms sorted by name see List of… …   Wikipedia

  • T. H. Clark — Thomas Henry Clark, Ph.D., FRSC (December 3 1893 ndash; April 28 1996) [cite news|title = In Memoriam Dr. T.H. Clark, 1893 1996|work = McGill Reporter Volume 28, Number 16|publisher = McGill University|date = 1996|url = http://reporter… …   Wikipedia

  • Liste des mineraux (lettre T) — Liste des minéraux (lettre T) liste des minéraux A B C D E F G H I J K L M N O P Q R S T U V W …   Wikipédia en Français

  • Liste des minéraux (lettre T) — v · Liste des minéraux A • B • C • D • E • F • …   Wikipédia en Français

  • Liste des minéraux (lettre t) — liste des minéraux A B C D E F G H I J K L M N O P Q R S T U V W …   Wikipédia en Français

Share the article and excerpts

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