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From French Lavoisier + -ite, named after French chemist Antoine-Laurent de Lavoisier.
Etymology from Wiktionary, CC BY-SA 4.0.
lavoisierite
Today it means: A mineral with the chemical formula Mn²⁺₈[Al₁₀(Mn³⁺Mg)][Si₁₁P]O₄₄(OH)₁₂. Full definition →