HHomeBackground Color:He
LiBePromethium Pictures PageBlack White GrayBCNOFNe
NaMgPromethium Technical DataAlSiPSClAr
KCaPromethium Isotope DataScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnUutUuqUupUuhUusUuo
Promethium     

Promethium

Atomic Weight 145[note]
Density 7.264 g/cm3
Melting Point 1.1×103 °C
Boiling Point 3×103 °C
Full technical data

Naturally radioactive promethium was briefly used as a replacement for radium in self-luminous paint, before tritium took over. This button was produced using left-over stock kept for making diving watches.

Scroll down to see examples of Promethium.
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!
Promethium Promethium glow switch

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Promethium glow switch.
I'm still trying to figure out exactly which part of the compact fluorescent bulbs I have contain the actual promethium. This might be it.
Source: Unknown
Contributor: Theodore Gray
Acquired: 29 April, 2009
Text Updated: 30 April, 2009
Price: Unknown
Size: 1"
Purity: <0.01%
Promethium Promethium igniter

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Promethium igniter.
The box for these compact fluorescent bulbs says they contain Pm-147 glow switches, which means a tiny amount of radioactive substance designed to keep the gas inside just ionized enough that the lamp will light when it's turned on.
Source: Unknown
Contributor: Theodore Gray
Acquired: 17 April, 2009
Text Updated: 30 April, 2009
Price: Unknown
Size: 6"
Purity: <0.01%
Promethium Promethium luminous compass

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Promethium luminous compass.
This is a beautiful solid brass compass of a design that dates back to WWI, but this one was most likely made in the 1950s or 1960s, assuming it does in fact, as claimed, contain promethium luminous paint on the dial. I hope it does because otherwise I don't have any example of a promethium luminous object.
Source: eBay seller ebms2006
Contributor: Theodore Gray
Acquired: 28 February, 2009
Text Updated: 1 March, 2009
Price: $60
Size: 2.5"
Purity: 0%
Promethium Fluorescent bulb initiator

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Fluorescent bulb initiator.
I think the two wires on either side of the coil in this picture are coated with a tiny amount of promethium-147. This is one of the electrodes from the inside of a Philips compact fluorescent bulb which my research indicates contains the substance as an arc initiator. Arguing against the proposition is that even my very sensitive mica-window Geiger counter does not detect any radioactivity. That, however, could be because only a very small amount is required for the thing to do its job, and I may not be able to detect it above the background level
Source: bulbconnection.com
Contributor: Theodore Gray
Acquired: 8 March, 2008
Text Updated: 8 March, 2008
Price: $5
Size: 0.5"
Purity: 0%
Promethium Sample from the Everest Set

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Sample from the Everest Set.
Up until the early 1990's a company in Russia sold a periodic table collection with element samples. At some point their American distributor sold off the remaining stock to a man who is now selling them on eBay. The samples (except gases) weigh about 0.25 grams each, and the whole set comes in a very nice wooden box with a printed periodic table in the lid.

Radioactive elements like this one are represented in this particular set by a non-radioactive dummy powder, which doesn't look anything like the real element.

To learn more about the set you can visit my page about element collecting for a general description and information about how to buy one, or you can see photographs of all the samples from the set displayed on my website in a periodic table layout or with bigger pictures in numerical order.

Source: Rob Accurso
Contributor: Rob Accurso
Acquired: 7 February, 2003
Text Updated: 29 January, 2009
Price: Donated
Size: 0.2"
Purity: 0%
Promethium Sample from the RGB Set

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Sample from the RGB Set.
The Red Green and Blue company in England sells a very nice element collection in several versions. Max Whitby, the director of the company, very kindly donated a complete set to the periodic table table.

To learn more about the set you can visit my page about element collecting for a general description or the company's website which includes many photographs and pricing details. I have two photographs of each sample from the set: One taken by me and one from the company. You can see photographs of all the samples displayed in a periodic table format: my pictures or their pictures. Or you can see both side-by-side with bigger pictures in numerical order.

The picture on the left was taken by me. Here is the company's version (there is some variation between sets, so the pictures sometimes show different variations of the samples):


Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 25 January, 2003
Text Updated: 11 August, 2007
Price: Donated
Size: 0.2"
Purity: 99.5%
Promethium Luminous disk

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Luminous disk.
I was sure I would never got a proper sample of promethium.

Fortunately, Max Whitby of The Red Green & Blue Company in England located a Swiss company that still had a supply of promethium paint, originally made by a Japanese company. Max sent them some glass buttons to be painted and then sealed shut.

I chose this sample to represent its element in my Photographic Periodic Table Poster. The sample photograph includes text exactly as it appears in the poster, which you are encouraged to buy a copy of.
Periodic Table Poster

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 15 October, 2002
Text Updated: 11 August, 2007
Price: Donated
Size: 0.4"
Purity: <5%
Promethium Photo Card Deck of the Elements

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Photo Card Deck of the Elements.
In late 2006 I published a photo periodic table and it's been selling well enough to encourage me to make new products. This one is a particularly neat one: A complete card deck of the elements with one big five-inch (12.7cm) square card for every element. If you like this site and all the pictures on it, you'll love this card deck. And of course if you're wondering what pays for all the pictures and the internet bandwidth to let you look at them, the answer is people buying my posters and cards decks. Hint hint.
Source: Theodore Gray
Contributor: Theodore Gray
Acquired: 19 November, 2008
Text Updated: 21 November, 2008
Price: $35
Size: 5"
Composition: HHeLiBeBCNOFNeNaMg AlSiPSClArKCaScTiVCrMn FeCoNiCuZnGaGeAsSeBrKr RbSrYZrNbMoTcRuRhPdAg CdInSnSbTeIXeCsBaLaCePr NdPmSmEuGdTbDyHoErTm YbLuHfTaWReOsIrPtAuHgTl PbBiPoAtRnFrRaAcThPaUNp PuAmCmBkCfEsFmMdNoLrRf DbSgBhHsMtDsRgUubUutUuq UupUuhUusUuo
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!