plagioclase
pronunciation
How to pronounce plagioclase in British English:
UK ['pleɪdʒɪəkleɪs]
How to pronounce plagioclase in American English:
US ['pleɪdʒɪrˌkleɪs]
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- Noun:
- any of a rock-forming series of triclinic feldspars
Word Origin
- plagioclase (n.)
- "triclinic feldspar," 1868, from German, coined 1847 by German mineralogist Johann Friedrich August Breithaupt (1791-1873) from plagio- + Greek klasis "fracture," from stem of klan "to break" (see clastic). Related: Plagioclastic.
Example
- 1. This could melt the plagioclase and reset its age .
- 2. But measuring the age of lunar plagioclase , samples of which were collected by apollo astronauts , is fraught with uncertainty .
- 3. Evidence for an early lunar magma ocean comes from orbital data showing an abundance of plagioclase , a lightweight mineral that crystallises from and floats to the top of magma .
- 4. But clive neal of the university of notre dame in indiana says some of the plagioclase - including this sample - might simply have melted again after the moon formed .
- 5. Aventurine is a combination of two gems named plagioclase feldspar and the other is quartz .