Thomasclarkite-(Y) is a rare mineral which was known as UK-93 until 1997, when it was renamed in honour of
Thomas H. Clark (1893–1996),
McGill University
McGill University (French: Université McGill) is an English-language public research university in Montreal, Quebec, Canada. Founded in 1821 by royal charter,Frost, Stanley Brice. ''McGill University, Vol. I. For the Advancement of Learning, ...
professor. The
mineral
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2011): Mi ...
is one of many
rare-earth element
The rare-earth elements (REE), also called the rare-earth metals or rare earths, and sometimes the lanthanides or lanthanoids (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), are a set o ...
minerals from
Mont Saint-Hilaire
Mont Saint-Hilaire (; English: Mount Saint-Hilaire; ;, ; see for other names) is a mountain, high, in the Montérégie region of southern Quebec. It is about thirty kilometres east of Montreal, and immediately east of the Richelieu River. It ...
. The only reported occurrence is in an alkalic
pegmatite
A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than and sometimes greater than . Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic c ...
dike in an intrusive
gabbro
Gabbro ( ) is a phaneritic (coarse-grained and magnesium- and iron-rich), mafic intrusive igneous rock formed from the slow cooling magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is ch ...
-
nepheline syenite
Nepheline syenite is a holocrystalline Intrusion, plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or pink, and in general appearance they are not unlike granites, but dark green varie ...
.
See also
*
List of minerals
This is a list of minerals which have Wikipedia articles.
Minerals are distinguished by various chemical and physical properties. Differences in chemical composition and crystal structure distinguish the various ''species''. Within a mineral speci ...
*
List of minerals named after people
This is a list of minerals named after people. The chemical composition of the mineral follows the name.
A
* Abelsonite: – American physicist Philip Hauge Abelson (1913–2004)
* Abswurmbachite: – German mineralogist Irmgard Abs-Wurmbac ...
References
Mont Saint-Hilaire
Carbonate minerals
Lanthanide minerals
Yttrium minerals
Sodium minerals
Monoclinic minerals
Minerals in space group 3
Minerals described in 1997
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