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A bright, silvery lanthanide metal that reacts slowly with oxygen. It has a few specialized uses including high intensity lighting.
 Lumps ampouled under argon Lumps ampouled under argon.
Dysprosium is not usually seen as the pure metal as it gradually corrodes as a result of oxidation. That is why these pieces are ampouled under argon. However this versatile element is widely used in alloys and compounds for a variety of industrial applications. As the iodide DyI3 it is the source of (almost) white light in high intensity lamps used to illuminate streets and large buildings. Dysprosium's very high magnetic strength makes it a popular material for magnetoelectronic applications (see also Terfenol in the terbium cube).
Source: China
Size: 0.75"
Purity: 99%
 Hard disk Hard disk.
You are almost certainly using a device that depends on dysprosium right now. The surface coatings of many hard drives include this element to enhance their magnetic properties. You can see the multiple platters revealed on this notebook drive. As they spin at high speed, the heads move back and forth reading and writing data in a circular pattern of magnetic bits on the ultra-flat surface.
Source: Scrap heap
Size: 2.5"
Purity: n/a