Ytterbium Facts - Yb Element

Yb Element Facts

Pure ytterbium is a lustrous, silvery metal.
Pure ytterbium is a lustrous, silvery metal. Jurii

Ytterbium is element number 70 with an element symbol Yb. This silver-colored rare earth element is one of several elements discovered from ores from a quarry in Ytterby, Sweden. Here are interesting facts about element Yb, as well as a summary of key atomic data:

Interesting Ytterbium Element Facts

  • Like other rare earth elements, ytterbium isn't really all that rare, but it did take scientists a long time to figure out how to separate the rare earth elements from one another. During this time, it was rare to encounter them. Today, rare earths are common, particularly in monitors and electronics.
  • Ytterbium was one of the elements isolated from the mineral yttria. These elements derive their names from Ytterby (e.g., Yttrium, Ytterbium, Terbium, Erbium). For about 30 years, it was difficult to distinguish the elements from each other, so there was confusion about which element belonged to which name. Ytterbium went by at least four names, including ytterbium, ytterbia, erbia, and neoytterbia, when it wasn't altogether confused with another element.
  • Credit for discovering ytterbium is shared between Jean-Charles Gallisard de Marignac, Lars Fredrik Nilson, and Georges Urbain, who identified the element over a period of several years, starting in 1787. Marignac reported the elemental analysis of a sample called erbia in 1878 (isolated from yttria), saying it consisted of two elements he called erbium and ytterbium. In 1879, Nilson announced Marignac's ytterbium was not a single element, but a mixture of two elements he called scandium and ytterbium. In 1907, Urbain announced Nilson's ytterbium was, in turn, a mixture of two elements, which he called ytterbium and lutetium. Relatively pure ytterbium was not isolated until 1937. A high purity specimen of the element wasn't made until 1953.
  • Uses of ytterbium include use as a radiation source for x-ray machines. It is added to stainless steel to improve its mechanical properties. It may be added as a doping agent to fiber optic cable. It is used to make certain lasers.
  • Ytterbium and its compounds are not normally found in the human body. They are estimated to be of low to moderate toxicity.
  • Ytterbium is a bright, shiny silver metal that is ductile and malleable. It is more reactive than the other lanthanide elements, so it is generally stored in sealed containers to keep it from reacting with oxygen and water in air. The finely powdered metal will ignite in air.
  • Ytterbium is the 44th most abundant element in the Earth's crust. It is one of the more common rare earths, present at about 2.7 to 8 parts per million in the crust. It is common in the mineral monazite.
  • 7 natural isotopes of ytterbium occur, plus at least 10 radioactive isotopes have been prepared.

Ytterbium Element Atomic Data

Element Name: Ytterbium

Atomic Number: 70

Symbol: Yb

Atomic Weight: 173.04

Discovery: Jean de Marignac 1878 (Switzerland)

Electron Configuration: [Xe] 4f14 6s2

Element Classification: Rare Earth (Lanthanide Series)

Word Origin: Named for the Swedish village of Ytterby.

Density (g/cc): 6.9654

Melting Point (K): 1097

Boiling Point (K): 1466

Appearance: silvery, lustrous, malleable, and ductile metal

Atomic Radius (pm): 194

Atomic Volume (cc/mol): 24.8

Ionic Radius: 85.8 (+3e) 93 (+2e)

Specific Heat (@20°C J/g mol): 0.145

Fusion Heat (kJ/mol): 3.35

Evaporation Heat (kJ/mol): 159

Pauling Negativity Number: 1.1

First Ionizing Energy (kJ/mol): 603

Oxidation States: 3, 2

Lattice Structure: Face-Centered Cubic

Lattice Constant (Å): 5.490

References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Lange's Handbook of Chemistry (1952), CRC Handbook of Chemistry & Physics (18th Ed.)

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