probertite
/ˈprəʊbətʌɪt/Mineralogy
noun
A colourless mineral of the monoclinic crystal system consisting of a hydrated borate and hydroxide of sodium and calcium, NaCaB5O7(OH)4·3H2O.
Origin
1920s. From the name of Frank H. Probert, U.S. mining engineer of British origin, who discovered the mineral + -ite.