Panethite (Na,Ca)₂(Mg,Fe)₂(PO₄)₂ is a rare phosphate mineral that was only found in one meteorite on Earth. It was originally found in the Dayton meteorite in Ohio. It is classified as H-M Symbol (2/m) with space group of P 2₁/n. It is amber in color. It was named in the honor of Friedrich Adolf Paneth, a German chemist who made many contributions toward the discovery of the origin of the universe, and especially studies of meteorites.