Zhèngchángshí shì chángjiàn de zào yán kuàngwù zhīyī.
Orthoclase is one of the common rock-forming minerals.
Tips
usage
正 ('right-angle') refers to the mineral's monoclinic cleavage at right angles, that's the meaning of 'ortho-' in orthoclase. Compare 斜长石 (xiéchángshí, plagioclase), where 斜 ('oblique') reflects the non-right-angle cleavage.
