from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A black, slightly magnetic mineral of zinc, iron, and manganese, ZnFe2O4, that is a valuable source of zinc.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An isometric-hexoctahedral mineral containing iron, manganese, oxygen, and zinc.
from the GNU version of the Collaborative International Dictionary of English
- n. A kind of mineral of the spinel group.
from The Century Dictionary and Cyclopedia
- n. An oxid of iron, zinc, and manganese, belonging to the spinel group.
The franklinite is mixed with coal and heated to a high temperature in a furnace, by which process the zinc is set free and converted into vapor.
~ Commercially it is often made from franklinite in the following way.
This state furnished minerals not found anywhere else; for instance the franklinite -- a compound of iron, zinc, and manganese -- named from Dr. Franklin.
They consist of willemite and zincite, together with large amounts of franklinite (an iron-manganese oxide) and silicates, in a pre-Cambrian white crystalline limestone near its contact with a coarse-grained granite-gneiss.
Also FYI, this is the correct way to spell amendment. franklinite wrote on Feb 20, 2009 6: 15 AM: