penninite

[ pen-uh-nahyt ]

noun

, Mineralogy.

1. a member of the chlorite group, rhombohedral in habit.

penninite

/ ˈpɛnɪˌnaɪt /

noun

1. a bluish-green variety of chlorite occurring in the form of thick crystals

Word History and Origins

Origin of penninite¹

1865–70; < German Pennin (after the Pennine Alps ) + -ite ¹

Word History and Origins

Origin of penninite¹

C20: from German Pennin Pennine (Alps) + -ite ¹

Example Sentences

Crystals of penninite are found in serpentine at Zermatt in Switzerland and in the green schists of the Zillerthal in Tirol.

From Project Gutenberg

Well-developed crystals are met with only in the species clinochlore and penninite; those of the former are six-sided plates and are optically biaxial, whilst those of the latter have the form of acute rhombohedra and are usually optically uniaxial.

From Project Gutenberg