röntgenite
/ˈrʌntjənʌɪt/ /ˈrʌntɡənʌɪt/ /ˈrəːntɡənʌɪt/(also roentgenite) Mineralogy
noun
A mineral containing the rare earth elements cerium and lanthanum, typically occurring as small yellow or brown crystals. Also röntgenite-(Ce).
- Röntgenite is a fluorocarbonate of calcium, cerium, and lanthanum, Ca2(Ce,La)3(CO3)5F3. Crystal system: trigonal..
Origin
1950s. From the name of Wilhelm Conrad Röntgen + -ite.