HHomeBackground Color:He
LiBeThorium Main PageBlack White GrayBCNOFNe
NaMgThorium Pictures PageAlSiPSClAr
KCaThorium Technical DataScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnUutUuqUupUuhUusUuo

Lantern mantle.
An example of the element Thorium

Sample Image
Thorium Lantern mantle
Lantern mantle.
Amazingly, Coleman-type camping lanterns used to contain some radioactive thorium oxide. It's an incandescent material that greatly increases the light output of the lantern when it's heated in the flame. There are non-radioactive alternatives, mainly other rare earth oxides, but they are more expensive. We know this mantle contains radioactive thorium because the donor, who works for the Environmental Health & Safety department at the University of Illinois at Urbana-Champaign, tested it with a Geiger counter.
The sound for this sample is from the Geiger counter.
I've got one mantle in a lead cup in the table, and another one in the Hot Box.
Source: Hardware Store
Contributor: Trish Craig
Acquired: 28 May, 2002
Text Updated: 12 March, 2007
Price: Donated
Size: 2"
Purity: <20%
The Elements book Mad Science book Periodic Table Poster  Click here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here!