What's the difference between plagioclase and trachyte?
Plagioclase
Definition:
(n.) A general term used of any triclinic feldspar. See the Note under Feldspar.
Example Sentences:
(1) Quantitative analysis by IR, XRD, and visible spectrophotometry requires a preliminary phosphoric acid digestion of the ash sample to remove the plagioclase silicate material which interferes with the determination by these methods.
Trachyte
Definition:
(n.) An igneous rock, usually light gray in color and breaking with a rough surface. It consists chiefly of orthoclase feldspar with sometimes hornblende and mica.