Definition of ripidolite in English:

ripidolite

Pronunciation /rɪˈpɪdəlʌɪt/

noun

Mineralogy
  • A mineral of the chlorite group with fan-like crystals, now regarded as a ferroan variety of clinochlore.

    Chemical formula: (Mg,Fe,Al)₆(Si,Al)₄O₁₀(OH)₈.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From French ripidolite or its etymon German Ripidolith from ancient Greek ῥιπίδ-, ῥιπίς fan + German -o- + -lith.