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

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