#Periodic table of elements cr how to#

I've never quite understood why chrome (and ferrochrome) is found with this kind of oxide on it. It came with two sides coated with thick green oxide. Not sure what they were doing with it, but I'm sure it was exciting and involved trips to mars or something. This lovely, and quite substantial, 1/2' thick slab of chromium is NASA surplus. Looking rather like a small charcoal briquette, this object is made of relatively pure chromium, and is used in analytical metallurgy. The notion of glass as a lubricant might seem strange, but at high temperatures, why not? Juan kindly ground and polished half of one side to show how pretty chromium gets when you give it a mirror finish. The slab is heated to red heat and dipped in powdered glass to form the coating. This is not, as one might think, chromium oxide (which is green) but rather a coating of glass used as a lubricant during the extrusion process. This huge, thick, heavy slab of chromium has a crusty greenish layer, visible on the bottom in this picture, and covering the whole back side if you look at the rotation video. Very shiny, my prettiest chromium sample for sure. These are probably electrodeposition crystals, though they may be vapor deposited. Up at the checkout counter where they had the various gummy bear related trinkets I found this lovely metal, almost certainly chrome plated, gummy bear key chain. Yes, an entire store that sells only gummy bears, nothing else (OK, they had gummy giraffes too, but you get the idea). Just down the alley from our hotel was a gummy bear shop, which quickly became one of the kids' favorite attractions. (Full disclosure, I am technically a Swiss citizen, so I'm allowed to say bad things about them.)

#Periodic table of elements cr how to#

We did many different things, and of course in Zurich this necessarily included shopping: You've got to hand it to the Swiss, they know how to get your money. It was quite a lot of fun especially since there were no fatalities. So, I took my whole family to Switzerland for a couple of weeks last summer. Both machined and broken surfaces are visible, although the broken ones are much more beautifully crystalline in structure. This piece was broken from a 4N pure sputter target. As for its origin, the original melting company has no idea what it was used for originally and neither do I-massive chunks of pure chromium are pretty scant, the two main examples being electrolytically deposited anodes and sputter targets, of which this is neither. What probably happened was that there wasn't perfect contact between the piece and the crucible, resulting in an arc which flash-vaporized a tiny amount of the copper crucible. Its purity is 3N, so it was partially melted down in a vacuum arc furnace in order to use it as a custom alloy additive- you can see a little bit of copper from the crucible in which is was melted on the top flat face. This is a formerly machined and threaded chromium plug of some sort. Presumably it spins in the wind as you're driving.Ĭr 2O 3 is used as a green pigment in paints and ceramic glazes. This is a chrome-plated plastic propeller designed to be mounted on the back of a trailer hitch that is not currently being used to pull a trailer. This process, called electrowinning, is how high-purity chromium is obtained from solution.Ĭlick here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here! Many shiny things are chrome-plated these chips show the result if you keep plating until a thick slab is built up. Pictures, stories, and facts about the element Chromium in the Periodic Table H