nuissierite
/ˈnwɪsiərʌɪt/ /ˈnʌsɪərʌɪt/(also nussiérite) Mineralogy
noun
A variety of pyromorphite in which lead has been partly replaced by calcium.
Origin
Mid 19th century; earliest use found in William T. Brande (1788–1866), chemist. From French nussiérite, nuissierite from the name of the Nussière (also Nuissière) mine in Chenelette, in the department of Rhône in east-central France + -ite.