When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hafnium - high precision density-standard cube 1cm3 -
10.0 x 10.0 x10.0mm - purity 99.95%
Pure European product - do not mix up with cheap chinese replicas!
Made in Germany - The most accurate density standard cubes available!
Hafnium - precision density-standard cube 1cm3 NEW!Using finest materials, each density cube was lapped to 10x10x10mmby a mechanical engineering company with an accuracy of0.01 millimeter.Eachoneseparately ground and polished it represents the theoretical density of the respective element by its weight. The weight is not affected by the laser inscription. Information such as element symbol, name and density is durable burned at the surface. Altogether 36 elements are available in a complete set in a wooden case (available separately).
Discovered in 1923 by D. Coster and G.C. von Hevesey in Copenhagen, Denmark.Hafnium is a silvery colored, ductile metal which is found in all minerals containing zirconium. The chemistries of the two metals are similar which makes them difficult to separate, and the properties of each are greatly affected by the presence of the other as an impurity. Both zirconium and hafnium are extracted as the pure metal by reducing the tetrahalide with magnesium, the whole process being carried out under argon as both metals readily combine with other gases (e.g. nitrogen). The abundance of hafnium in the earth\'s crust is 5.3 ppm.Hafnium will resist corrosion in air due to the formation of an oxide film, although powdered hafnium will burn in air. It is unaffected by alkalis and acids, with the exception of HF. Hafnium can be used to control recrystallization of tungsten filaments but its main application is as control rod material in nuclear reactors due to its ability to absorb neutrons. The ability of hafnium to absorb neutrons means that it can sometimes be an annoying impurity in zironium metal which is used for nuclear engineering.Source: ©Goodfellow.com
scope of deliveryYou get one Hafnium - precision density-standard cube 1cm3
shipping fees
We calculate following shipping fees:
Table of shipping fees:
USA, Canada$26.90Asia, South America, Africa$31.50Australia, New Zealand, Oceania$37.00
Courier Express Services:
Items up to 1kg (2.2lbs) by Courier Express (Very fast! 1 - 3 days lead time )USA, Canada$125.00Australia, New Zealand, Asia and other countries outside EU$152.30
Items over 1kg up to 2kg (4.4lbs) by Courier Express (Very fast! 1 - 3 days lead time )USA, Canada$133.40Australia, New Zealand, Asia and other countries outside EU$169.70
I am happy to combine shipping to save you money! Please contact me!
