aphthitalite
noun
aph·thit·a·lite
afˈthitᵊlˌīt,
apˈth-
plural -s
: a mineral (K, Na)3Na(SO4)2 consisting of potassium sodium sulfate occurring massive or in white rhombohedral crystals
Word History
Etymology
Greek aphthitos indestructible (from a- a- entry 2 + —assumed—phthitos, verbal of phthiein to waste away) + hal-, hals salt + English -ite