Definition of northupite in English:

northupite

Pronunciation /ˈnɔːθʌpʌɪt/

noun

Mineralogy
  • A chloride and carbonate of sodium and magnesium, Na₃ Mg(CO₃)₂ Cl, found as fine octahedral crystals belonging to the cubic system.

Origin

Late 19th century. From the name of Charles H. Northup (b. 1861), of San Jose, California, who discovered the mineral + -ite.