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penninite
[ pen-uh-nahyt ]
noun
Mineralogy.
- a member of the chlorite group, rhombohedral in habit.
penninite
/ ˈɛɪˌԲɪ /
noun
- a bluish-green variety of chlorite occurring in the form of thick crystals
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51Թ History and Origins
Origin of penninite1
1865–70; < German Pennin (after the Pennine Alps ) + -ite 1
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51Թ History and Origins
Origin of penninite1
C20: from German Pennin Pennine (Alps) + -ite 1
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Example Sentences
Examples have not been reviewed.
Crystals of penninite are found in serpentine at Zermatt in Switzerland and in the green schists of the Zillerthal in Tirol.
From
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.
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