Manganese Metal 10mm Density Cube 99.5% Pure

Manganese Metal 10mm Density Cube 99.5% Pure: Industrial & Scientific. Manganese Metal 10mm Density Cube 99.5% Pure: Industrial & Scientific. At first glance this ugly cube seems unworthy of a place in a collection. But this battle-scarred little thing has a story to tell. Why? Manganese, it turns out, is an exceptionally difficult metal to obtain in high purity OR machine into a recognizable shape when in its pure state. The reason is locked up in arcane details of chemistry the upshot of which is that while the metal is perfectly docile at room temperature when heated it becomes highly susceptible to oxidation. And almost every type of machining operation involves friction, which of course creates heat... which readily ruins the Mn sample. The making of this high-purity cube therefore required overcoming two major challenges. First, it needed to be purified beyond the usually seen grades of 98-99%. As mentioned above, one of manganese's most desirable properties is that it scoops up contaminants from steel alloys. This means that divorcing it from its catch is going to take a lot of effort. Secondly, after accomplishing the first goal, any machining operation has to be done under a very fastidiously pure atmosphere or in such a way as to create as little heat as possible... and metals are not generally known for being easy to work while cold! Thus, we hope you can now appreciate the little pot marks and imperfections that grace the surface of this shy metal that seemingly would be happier invisibly tucked away inside other metals. This is a rare opportunity that we're happy to offer the advanced collector. The density of each 10mm cube is 7.2g with a tolerance of ±0.1g, representing full theoretical density. 。 。 。