Thorianite is a 10 letter English word. It's valid Words with friends word worth 13 points.
You can make 552 anagrams from letters in thorianite (aehiinortt).
1900-05; thorian (thori(a) + -an) + -ite1
Much the best practical source of helium is thorianite, a mineral imported from Ceylon for the manufacture of thoria.
The richest known source is thorianite, which consists mainly of thorium oxide, and contains 9.5 cc.