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allanite
[ al-uh-nahyt ]
noun
Mineralogy.
- a member of the epidote group, a silicate of calcium, cerium, aluminum, and iron, occurring chiefly in brown-to-black masses or prismatic crystals.
allanite
/ ˈæəˌԲɪ /
noun
- a rare black or brown mineral consisting of the hydrated silicate of calcium, aluminium, iron, cerium, lanthanum, and other rare earth minerals. It occurs in granites and other igneous rocks. Formula: (Ca,Ce,La,Y) 2 (Al,Fe,Be,Mn,Mg) 3 (SiO 4 ) 3 (OH)
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Other 51Թ Forms
- ··Ծ· [al-, uh, -, nit, -ik], adjective
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51Թ History and Origins
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51Թ History and Origins
Origin of allanite1
C19: named after T. Allan (1777–1833), English mineralogist
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Example Sentences
Examples have not been reviewed.
“That’ll be the allanite. It’s a rare earth mineral,” Wilson explains.
From
Belonging to the same isomorphous group with epidote are the species piedmontite and allanite, which may be described as manganese and cerium epidotes respectively.
From
Although not a common mineral, allanite is of fairly wide distribution as a primary accessory constituent of many crystalline rocks, e.g. gneiss, granite, syenite, rhyolite, andesite, &c.
From
Allanite is a mineral readily altered by hydration, becoming optically isotropic and amorphous: for this reason several varieties have been distinguished, and many different names applied.
From
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