nadorite
/ˈnadərʌɪt/ /ˈneɪdərʌɪt/Mineralogy
noun
An orthorhombic oxychloride of antimony and lead, PbSbO2Cl, usually occurring as brown to yellow tabular or prismatic crystals.
Origin
Late 19th century; earliest use found in Nature: a weekly journal of science. From French nadorite from Jebel Nador, the name of a mountain in the province of Constantine, Algeria, where the mineral was first found + -ite.