Dysprosium - THE MOST MUSICAL METAL ON EARTH!

Do not repeat the experiments shown in this video!
Today I am gonna tell you about a quite unusual metal - dysprosium. As it is clear from the element’s unusual name dysprosium belongs to the lanthanide series where it is preceded by terbium. Like other rare-earth metals dysprosium can be found in various minerals such as xenotime, monazite, gadolinite. The name dysposium is derived from the Greek 'dysprositos', meaning hard to get because it is very hard to extract pure metal from its ore and separate it from other metals. Pure dysposium is a gray metal. My sample is pretty old and has covered in gray oxide layer. Dysprosium is a pretty expensive metal and it costs about 20 dollars on ebay. Its physical properties are not that much different from other lanthanides although I have began to question that. For instance a Wikipedia article about the metal in English says that the metal is very soft and that it can even be sliced with a knife. Hm, let us check. I can’t cut it with a knife although it’s possible to cut off a small piece. Probably my sample is just fragile because of its porous structure but it can’t be cut with a knife that is why it is always check if the information is true. Also dysprosium gets attracted to a powerful neodymium magnet quite well, of course not as good as iron. Nevertheless, dysprosium is paramagnetic at room temperatures but if frozen to the temperature of liquid nitrogen it can become ferromagnetic. This property of the metal has applications in a special alloy called terfenol-d the formula of which you can see on your screen. This alloy has a unique property called magnetostriction. To put it simply, if a pole made of this alloy is inserted inside a copper wire coil and alternating current is passed through it, such a pole will be slightly lengthening upon magnetizing and shortening upon demagnetizing. In an alternating magnetic field the pole can quickly change its length and make vibrations that can turn into music! This is where this property of terfenol-d is used - in vibration speakers.

[nicholasc]

It’s really a humbling experience when a really intelligent and professional individual Shares his knowledge with the masses for free and for the sake of teaching others when he could literally charge for it

[electronicsbyjulie]

Its spectrum is really cool and distinctive too: a bit of violet, a strong emerald green doublet, some more green/chartreuse, and some orange. The rare earths are my favorite elements, not sure if I have a favorite lanthanide but dysprosium is very much in the running!

[Shadobannedlife]

Very informative and useful. Good work.

[christopherleubner]

One use of this alloy of dysprosium is for the scanning mirror of a fine transistion scanning interferometer.

[donstor]

You always have something interesting to show us. Thank you.

[bonnitaclaus]

I love this. It is so much fun. The elements are all around us, we know them by what they do, but do not know them by their name and how they do it. It makes everything a richer and deeper in meaning to understand how marvelous the world is... The world within our own living room.

[rogelioayus]

Dyspacito- Most musical metal on earth

Seems legit 😂

[EnergyTRE]

Nice to hear your voice again. This is one of my goat elements

[callemoslosbrutose]

THANKS FOR YOUR INFORMATION. YOUR CLASSES ARE VERY IMPORTANT.

[andersonnobre]

Thank you for sharing knowledge with us!!!!

[bensullivan]

regardless of your own theories/opinions this man has taught me more about this subject than i could have ever learnt from the average school here in new zealand. and to those discussing whatever income he gets from these clips; imagine how much he could bank if he put this knowledge to sinister or destructive use. i feel the passion he has for these educational videos says more than any $ figure could.

[patrickmcleod]

Another great science video! I gotta get one of those crazy speakers!

[brandonboulton]

Ferrolectrics are awesome. Rochelle salt is a good one to cover too.

[segregario]

"It iz derived from ze name Zespacito"

[pantherplatform]

Where was this when I was in college chemistry? I may have actually wanted to learn that shit if I knew it was this fascinating.

[PecanPie]

Your coolest video, you try to do the rest in those two horizontal columns.your class is better then my chem 1&2 classes in college

[marcoahernandezgarcia]

Yay! This channel has it's own cat too!

[georgevavouras]

Wow, I thought this video was sponsored by the speaker company and waited to see the advertise, haha.😂😂

[comradedog]

you are amongst the best chemistry channels (nile red and explosions and fire are king tho )

[nonothebot]

I always love your videos. Thank you.
As it seems that you own a lot of different elements, could you make a periodic table with all your samples if it is not done yet ?