Iridium - Periodic Table of Videos
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- Опубліковано 18 лип 2013
- Up close with some big samples of real Iridium. Our thanks to Johnson Matthey. See all the elements at bit.ly/118elements
Naming Iridium: • Iridium and Osmium Dis...
Gold Vault: • Gold Bullion Vault - P...
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From the School of Chemistry at The University of Nottingham: www.nottingham.ac.uk/chemistry...
Periodic Videos films are by video journalist Brady Haran: www.bradyharan.com/
Brady's other channels include:
/ sixtysymbols (Physics and astronomy)
/ computerphile (Computer stuff)
/ numberphile (Numbers and maths)
/ deepskyvideos (Space stuff)
/ nottinghamscience (Science and behind the scenes)
/ foodskey (Food science)
/ backstagescience (Big science facilities)
/ favscientist (Favourite scientists)
/ bibledex (Academic look at the Bible)
/ wordsoftheworld (Modern language and culture)
/ philosophyfile (Philosophy stuff)
/ psyfile (Psychology stuff) - Наука та технологія
"For once I can keep Brady in order" I love this guy so much. He's always so playful yet talks so intelligibly and with such enthusiasm and enjoyment.
His mild happiness with that bar of iridium is contagious, sort of.
I love this professor... I wish I had him in school, every word he speaks has passion for science in it
The hair, the tie, the glasses, the jokes, the tremor. This man is a character!
I had an eccentric professor in college who reminded me of him.
Looks like someone had fun with the zoom function on that camera.
Peter Carlson now i can't unsee it
Littlemanz Jordan I know. Isn't it irritating?
Lack of experience. Give an avarage person a camcorder and they'll do this all the time, because they want to tell a story with the framing, but don't understand how to do that.
It's so damn annoying...
In the start i just thought he was focusing on the iridium written on his tie, but then he just won't stop lol
You can tell he is really loves elements at 5:26. I don't think the professor ever fanboys this much over anything. I really like how passionate about his work, and how clearly he demonstrates his excitement. That's what pulled me into these videos on the first place.
Teachers like him are becoming harder to find. That's what makes these videos special to me.
@@povnw8985 ❤️🧪
I've just stumbled on this series. A blast from the past as I worked with Martyn as a humble technician at Newcastle University. He really hasn't changed. All the very best sir.
❤️🧪🧪🧪🧪🧪
The professor does vodka shots?! I'll go there when i finish my pHd.
Sebastián Manríquez i was searching for this Comment hahaa
He's actually a very cool guy.
Shots? Nah he drinks vodka straight like a Russian. Shots are for college kids and girls.
Dave Hobbs shots are straight vodka, shots go into mixed drinks.
It's hard to imagine him drunk.
Professor: That's not Iridium
*pulls out long Iridium rod*
Professor(Aussie accent): That's Iridium.
He’s British not Aussie smh
@@brianisme6498 he’s making a joke you bumbling fool
@@cryamistellimek9184 well, I didn’t suggest it wasn’t did I?
@@brianisme6498 No, but you did suggest you weren't aware he was making a joke.
@@shadesilverwing0 when? Where did I say it wasn’t a joke?
This guy looks like science
This guy *IS* science
.
He smells even sciencier.
He is a scientologist haha
This comment looks like stolen.
@@haveatyou1 yeah, in every single video
"this is a metal free zone..."
-brings in whole camera equipment 😂 Great video by the way!
I'd never get in ... "I'm made of Metal ... My circuits gleam" "I Am Iron Man"!
Legend says that when you don't retest the results of your experiment 3 times before writing your report, Professor Poliakoff will come for your kneecaps with his iridium rod.
Martyn, you are an international treasure sir. I've never met anyone who could spark my interest in learning like you have done, thank you.
I have been following along the series of elements completely enraptured. The professor is engaging with his knowledge, personal anecdotes, and flairs of coy humor. Am enjoying these very much. Had no idea elements were this fascinating.
"might make quite a good vodka glass, actually" someone went hard in college
Fun fact: if a 10 kg dumbbell was made of iridium, it would look like it was just 3.5 kg (assuming that "normal" dumbbells are made of steel of which density is 8 g/cm^3).
Wish the History Channel or Discovery Channel would produce a real show like this
700,000 tonnes of earth to be mined to get 3.5kg of Iridium. Staggering, just staggering.
According to Johnson Matthey, the Iridium price was $900 oz t on 19/07/13.
That bar weighs 3.8 kg and would have been worth at least $109,953.
For the most part it's not economic to mine Iridium on it's own. More typically it is a byproduct of Copper and Nickel (amongst other) mining.
Joe Black , That's what I was thinking. A by-product would be a freebie unless more processing is necessary. I'd like another video.
@@flymasterA I think it's just useful enough for buyers to be willing to carry the cost and probably some profit.
Joe Black , Like the tip on a plug, my interested is sparked to find properties and novel uses for it.
Professor, what you need is an Iridium Crowbar: Gordon Freeman's weapon of choice I'm sure.
Lol now I'm picturing an action movie starring Dr. Polyakoff. :D
It would be very heavy so Gordon would have beefy arms.
4:53 - I love how he's holding the iridium directly in front of the Ir box on his tie.
My dream has always been to have an iridium sword, and since iridium is mostly found on meteorite crash sites, you could call it a meteor sword.
Though you get more iron in meteorites 😅 And steel is actually harder than Iridium
6:06 Serves the dinosaurs right for all standing in the same place.
This guy is the personification of science.
That is truly an astonishing amount of iridium in one place, let alone one piece! Thanks for making this video, as this will probably be the most iridium ever viewed by the masses, in one place, in the world.
Iridium 192 is also widely used as an isotope for Gamma radiography.
You guys make chemistry even more awesome. Thanks.
These videos will never stop being interesting.
love your videos. As a chem eng student, its nice to have a constant reminder that chemistry still kicks ass!
I hop you don't mind, but I would like to make a request. The "artistic" camera movement is quite distracting (not to mention nausea inducing). Would it be possible to hold the camera still?
So, if it has such a high melting point, what kind of substance is the crucible made of in which iridium is melted?
Unobtainium.
Silentspeaker3 osmium I guess
tantalum hafnium carbide crucibles.
@@whatbizarreactisthecaninep791 idiot.
An electric arc furnace
In addition to this obviously wonderful, and informative video, let's just talk about his phenomenal periodic table tie for a minute...this guy is the best!
I love your videos! Thank you so much for teaching people about these elements.
2:37 wow this metal is so dense that every ounce weighs 800 pounds
what?
800 pounds as in the currency
And it's getting heavier
or about 1040 dollars
It was a joke guys. I'm pretty sure he knew.
He has a scientific hair do. If there was a picture of a scientist in the dictionary, his picture should be there.
your absolutely right! 😁
What about his absolutely right?
Honestly, it kind of annoys me that people always imagine scientists having hair that looks like they were just struck by lightning.
Just Multiply You have to find more important things to be annoyed by....lol!
inquizative44 You have to find more important things to point out!
Thank you proffesor, i was always intrigued about this rare metal. Now i just love your videos a lot more.
When he held the grains for the camera, the Iridium symbol on the tie was visible through the canister; not by accident I'm sure! Great videos!
So if we could mine asteroids and iridium became cheap like steel, what uses would we have for it?
Turbines for jet engines?
Now I need an iridium sword for the zombie apocalypse.
Ya damn right!
Bad Idea cause of its heavy weight.
For anyone curious.. as of October, 2021:
Iridium has a spot price, per troy ounce (31.1 g). So this 3.8 kg (122.2 troy oz) bar is worth, approximately:
- 4900 USD/oz = $600,000
- 3560 GBP/oz = 435000 GBP
- 4233 EUR = 517300 EUR
I have one metal bar in my custody. I diceide to sell.?
I cant believe there are people that don't subscribe to this channel, never would be able to see this apart from this youtube channel. awesome
Awesome tie!
1:36 Naaaaaahahhhh My man! :D
BTW Make Irridium dumbbells and trick professional weightlifters on April fools day XD Yeaahh that's just a 200kilo wight XD
Yeah that would be funny! "Hey go lift that 5kg weight." (Actually weighs like 50) "I cant dude" "ahh you weakling" . Hahaha I can imagine it already!!
Tommy Davies OH! to add to it you lift an actual 5kg weight, "see, no big deal!" and just leave them with the Iridium one.
The shot of science XD
That would be expensive
That dumbbell would probably cost millions of dollars.
That 3.8kg bar is 134oz is £107,000 at the time
Thank you for sharing your knowledge... I am not an "academic mind" but not for lack of my desire. I want toreturn to school when I can and study history or chemistry... I appreciate your time and sharing it with "us"... Thank You again - Joe
I feel smart watching this
What if I forget a element in periodic table!..
Nooooo-
Oh my tie,
*You saved my life!*
Love these videos, been binging them this week or so! That Iridium bar is worth £667,000 as of 28th June 2021!!
How can check original or duplicate, iridum metal
Part of the charm of this channel is just how intensely stereotypical of a scientist Professor Poliakoff is. Brilliance, a massive pool of knowledge, and white Einstein-esque hair - it gives a sense of both respectability and cuteness at once.
Iridium was once used to make the tips of fountain pen nibs.
A number of them are coated with osmium as it is even less subject to wear.
I'm inferring that Dr. Poliakoff likes his vodka. :)
I think the camera guy likes his vodka too, judging by the drunk camera work lol
What an amazing element. Great video!
Live long and prosper, dear Professor! We all love you!
I understand that iridium has a very high melting point (about 4400 degrees F). But why not make crucibles out of rhenium instead? It's much cheaper, it's essentially inert, and has a melting point of a whopping 5700 degrees F.
It and iridiums price flux significantly by their demand and at one point in 2008 rhenium was significantly more expensive.
Unsure about chemical properties that would favour one over the other though.
There sure is a lot of Iridium on pandora!
I thought that was Unobtainium...
wrong pandora, op is talking about the pandora from borderlands (videogame series)
Ah, ok.
It's Eridium
no, it's 55 Pandora
Can't mention iridium without mentioning the K-T boundary. Thanks for another great video!
The best chemistry videos.
I have a question.
Why is it the science faculty of the University of Nottingham is so active on UA-cam with some really amazing content but you don't really see any other similarly focussed technical universities doing the same thing?
I did my computer science degree at DIT->Abertay. It was a great technical college and then for computing at least a great university.
They should be doing the exact same sort of thing as you guys.
I had some amazing lecturers that should be doing this sort of thing.
I'm thankful you guys are doing this but I guess I wish others were following your example.
Thanks.
Luv and Peace.
What do you melt iridium in?
Andrew Lee
I haven't been able to find a crucible made out of that material..
The only crucible I've been able to find thus far that could probably safely handle Iridium is Magnesia Stabilized Zirconium Oxide (ZrO2) Zirconia.
It has a maximum working temperature of about 2500 Celcius and a melting point at over 2700 Celcius
Andrew Lee *shakes fist* Use metric/SI units or DIE!!! : P
zZDaGermanPhilZz
Hi, are you sure the stuff can be molded into a crucible.. Again I have not been able to find a crucible made out of that material. I am not questioning the material's melting point.
undefinablereasoning I'd imagine so yes but I have no solid proof of course...at least it can function as a caoting for different metals to make them more heat resistant :P
becton98 graphite crucible
What are the crucibles used to pour molten Iridium made out of?
I really enjoy these videos.
I bought a piece of Iridium because it's neato wow. Tiny shiny blob, $200US and weirdly heavy for its puny size. It is incredibly hard and inert and resists everything I do to it. From what I'm told, it'll look exactly the same 1,000 years from now. Freaky stuff.
Ah ya.... Same with gold and platinum..
@@dphorgan and osmium
So what you're saying is...
Jet fuel can't melt iridium beams?
+Donald Neal jet fuel burns at 4000 degrees F. Steel melts at 2500F
But can laser beams melt iridium bars?
+David Vermillion yes, but steel loses half of its strength at 550°c
peanuts2105 I know right? The whole myth of "jet fuel can't melt steel" is bull. Why do they need extremely expensive nickle based alloys for jet engine turbines if jet fuel can't melt steel? I know they compress the air for more performance therefor higher temperature but science should be looked at first before idiots spout conspiracies.
+David Vermillion Its not about melting, but about the fact that steel loses half of its strength at about 600C. Thats why like in buildings, you often have some sort of fire protection on steel pillars, because in event of fire, they would heat up, bend and collapse.
Great tie! Great hair! Even greater and informative video clips.
Thank you Sir full respect. It would be amazing if I get a chance to meet this person practically.
5:35 My favorite line from Professor Poliakoff so far!!
t still intrigues me how they were able to identify the different elements and then put them on the periodic table according to their atomic mass.
There were other factors (reactivity etc.), but yeah
It's not arranged according to atomic mass, but atomic number. It's easy with X ray crystallography.
@@JetFalcon710 nazi
i love welding iridium. it is by far the craziest thing i have ever welded. To crank a welder up to 350 amps floor the pedal and not blow a hole through 1/8 inch thick of metal is outstanding.
More like this please (showing the uses of certain metals, etc.)
vodka glass hee hee xD I love the professor!
"This man is cool as a polar bears toe nails!!!"....
It’s also theorized that while it’s rare above the crust of the planet, it may be more plentiful in the mantle or the core of the earth. When the earth was young and a roiling mess of molten rock, it’s theorized that heavier elements like osmium and iridium sank inside the earth since it’s more dense.
amazing as always
You could also use a Tunsgten crucible, which has a melting point of over 3000C and it's really a lot cheaper.
AluminumHaste Sometimes is a question of durability too. The tungsten in a light bulb doesn't last much
iridium is much more inert
Lucas Rodmo we're not talking about a thin filament, but a crucible made from it with thick sides.
@@LucasRodmo What's that got to do with anything? Obviously a crucible is going to be a lot thicker and a bulb filament.......... People trying to act smart lol
@@dphorgan Actually not. Search online and you will understand why this matter. Tungsten is brittle in high temperature, this is why NASA never used it in their heat proof exterior components. They are the scientists, if they are using iridium in this case, is because is the more appropriate.
Now, that's heavy metal ... "I AM IRIDIUM MAN!"
What % purity is the Iridium in spark plug tips?
Nice shot. Iridium in front and the symbol and number on the tie.
So what is crucible from which the iridium was made? There must be an ultimate melting point solid.
Ceramic crucibles don't melt.
+Matthew Granstrom so why do you need an iridium crucible vs. ceramic?
For certain crystal-growing applications [as said in the video]. There are some experiments which require iridium crucibles for this purpose, as ceramic will not work for growing some crystals.
+Enny Gima yes I imagine there are special uses for it. Probably the jet engines or rockets would not be nearly as reliable without these very exotic special metals.
you can use tungsten, that has the highest melting point of all pure metals.
Imagine hitting somebody with that rod, that would hurt alot
pretty much anything denser than foam will hurt tho
"I AM IRIIDIIUUUM MAN!"
Love you dude man you make learning way to fun
The KT-boundary is represented in the "fiskeler" (fish clay) at Stevns in Denmark. And very visible. Visit it some day.
I'm pretty sure the spark plug tip wears more due to the plasma arc than the combustion.
Now to the junker to get me some spark plugs :). Im gonna be rich!
My favorite fountain pen has an iridium nib. Writes great.
Yes. In USA too. When Uranium decays, it transforms in such noble metals like Rhodium, Ruthenium..and other no noble, Molybdenum. Palladium is also obtainable but harder to get from the decay product
iridium killed t-rex, Damm you space!
If the T-REX was still around, we'd never be here.
Got proof?
@@jonhohensee3258 a thin layer of iridium rich rock formed when the asteroid that killed the dinosaurs slammed into Earth, 65 million years ago. It's called the KT boundary.
@@HobzyMcRuse - That's evidence, not proof.
@@jonhohensee3258 It's fact. The KT layer of iridium can only be formed from a massive meteorite impact. The age also coincides with the age of the massive chicxulub crater. Maybe the dinos were in decline but this was the final nail in the coffin. No dino fossils can be found above this layer. You won't find better scientific proof.
I named my daughter Iridium. Iridium Crystal Carone!
Iridium is also a common tipping material for fountain pens. Most pens with nibs made of gold or palladium are tipped with iridium to avoid wear.
Well, sort of. It's rarely actual iridium. If they use any similar metals and alloys, they like to call it iridium anyway, even if there isn't a trace of it. Something I find highly annoying.
Love your show!
Imagine a sword made of this metal, or a work hammer
+Ian “Worldbreaker” DeNault Too heavy.
+W3rking W0nders It's called "Mjolnir", I know you wrote that two months ago but I had to. :p
Ian DeNault Too heavy. Steel is fairly light weight and resistant enough for the job.
My mom saw me watching this and thought that his hair was a joke
I have chilled vodka waiting anytime he’s in town. Love this guy!
The Professor's tie is plain awesome!
nice.
Stop moving camera, please.
NOOOO!!!! HE just said "Its density makes it very hard and rigid". Hardness and Density are independent properties.
he never said that they weren't independent. don't blame your poor comprehension skills on him.
OK, you can not comprehend that stating that A leads to B logically requires that when A is present B be present. Lead is considerably denser than steal but steel is harder than lead. Mercury is even denser than lead and it is a liquid.
michalchik I'm sure the prof misspoke.
Terry Madill You are probably right. Its just that I try to teach how these propertie are seperable to my students so i get weirded out when authority figured screw it up.
Youll get over it
That bar is the biggest piece of iridium I've *ever* seen, and the Prof is just holding it...Professor, I am very envious of you at this point, more so than when you held the gold bars. Everyone has seen gold once in their life, but no one I know has ever gotten to hold pure iridium. Great video, and I'm just kidding, I'm happy for the Prof, as I know he is too.
The iridium aint the only rare element there.....you ar3 a rare individual. Thank you so much for shareing your knowledge, and your enthusiasm.
my cat's name is iridium
DrVonschnit ah a cat, the ideal pet for a James Bond villain
That's one hard cat.
is anyone else thinking captain america shield
Vibranium
Very nice information, thanks!
I wish I could learn under that man. quite an extraordinary personality