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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
/ 藞忙濒蓹藢苍补瑟迟 /
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 亚洲网紅露点 Forms
- 补濒路濒补路苍颈迟路颈肠 [al-, uh, -, nit, -ik], adjective
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亚洲网紅露点 History and Origins
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亚洲网紅露点 History and Origins
Origin of allanite1
C19: named after T. Allan (1777鈥1833), English mineralogist
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Example Sentences
Examples have not been reviewed.
鈥淭hat鈥檒l be the allanite. It鈥檚 a rare earth mineral,鈥 Wilson explains.
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
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
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.
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