Ru - Ruthenium


Atomic Number: 44
Atomic Weight: 101.07
Element Type: Transition Metal
Crystal Structure: Hexagonal
Melting Point: 2334.0°C = 4233.2°F = 2607.15 K
Boiling Point: 4150.0°C = 7502.0°F = 4423.15 K
Critical Temp: °C = °F = K
Atomic Radius: 1.89 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.25 Å
Electronegativity: 2.2


(L. Ruthenia, Russia) Berzelius and Osann in 1827 examined the residues left afterdissolving crude platinum from the Ural mountains in aqua regia. While Berzelius found nounusual metals, Osann thought he found three new metals, one of which he named ruthenium.In 1844 Klaus, generally recognized as the discoverer, showed that Osann's ruthenium oxidewas very impure and that it contained a new metal. Klaus obtained 6 g of ruthenium fromthe portion of crude platinum that is insoluble in aqua regia.


A member of the platinum group, ruthenium occurs native with other members of the groupin ores found in the Ural mountains and in North and South America. It is also found alongwith other platinum metals in small but commercial quantities in pentlandite of theSudbury, Ontario, nickel-mining region, and in pyroxinite deposits of South Africa.

xUmp Science eStore

Science Quote

Isaac Newton Photo

'To myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.'

Isaac Newton

- All rights reserved. © Copyright '1995-'2018