mcgovernite
noun
mc·gov·ern·ite
məˈgəvə(r)ˌnīt
plural -s
often capitalized M&G
: a mineral Mn5(AsO3)2SiO3(OH)2 consisting of a basic silicate and arsenite of manganese that is found at Sterling Hill, New Jersey
Word History
Etymology
J.J. McGovern †1915 American mine foreman + English -ite