pirssonite

noun

pirs·​son·​ite

ˈpirsᵊnˌīt,

ˈpər-

plural -s

: a mineral Na₂Ca(CO₃)₂.2H₂O consisting of a hydrous calcium sodium carbonate and occurring in white or colorless orthorhombic crystals (hardness 3, specific gravity 2.35)

Word History

Etymology

Louis V. Pirsson †1919 American mineralogist + -ite

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