parkerite
/ˈpɑːkərʌɪt/Mineralogy
noun
A mineral of the orthorhombic crystal system which consists of a sulphide of nickel and bismuth, Ni3Bi2S2 (often also containing lead), and occurs as light bronze crystals with a metallic lustre.
Origin
1930s. From the name of Robert Lüling Parker, Swiss mineralogist + -ite.