noun
- Plural of allanite; a group of rare-earth silicate minerals, typically dark brown or black, found in igneous and metamorphic rocks.
Usage: mineralogy; technical
Examples
- Allanites are commonly found in granitic rocks and pegmatites.
- The geologist identified allanites in the thin section under the microscope.
- Allanites contain significant amounts of rare-earth elements, making them of scientific interest.
- These allanites displayed the characteristic dark coloration typical of the mineral group.