palmierite
/palˈmɪərʌɪt/ /ˌpalmɪˈɛːrʌɪt/Mineralogy
noun
A trigonal sulphate of potassium and lead, K2Pb(SO4)2 (often with some sodium), occurring as small, colourless hexagonal crystals.
Origin
Early 20th century; earliest use found in Mineralogy Magazine. From French palmiérite from the name of Luigi Palmieri, Italian meteorologist + French -ite.