Density: 6.81 g/cm3. Film deposited at room temperature.
1) J. I. Larruquert, J. A. Aznarez, J. A.Méndez, and J. Calvo-Angós. Optical properties of ytterbium films in the far and the extreme ultraviolet, Appl. Opt.42, 4566-4572 (2003) 2) M. Fernández-Perea, J. I. Larruquert, J. A. Aznárez, J. A. Méndez, L. Poletto, D. Garoli, A. M. Malvezzi, A. Giglia, and S. Nannarone. Optical constants of Yb films in the 23-1700 eV range, J. Opt. Soc. Am. A24, 3691-3699 (2007) (Numerical data kindly provided by Juan Larruquert)
Ytterbium (Yb) is a soft, malleable, and ductile chemical element with the symbol Yb and atomic number 70. It belongs to the lanthanide series of the periodic table and is typically silvery-white in its metallic form. While Yb is found in certain minerals such as monazite and euxenite, it is primarily obtained through the mining and processing of ytterbium-containing ores. Ytterbium has several isotopes, both stable and radioactive. In the realm of photonics and laser technology, ytterbium-doped materials, especially fibers and crystals, have gained prominence due to their efficiency and broad tunability, with applications ranging from high-power continuous wave lasers to ultrafast pulse generation. Ytterbium is also used in atomic clocks due to its sharp electron transition frequencies, making these clocks remarkably precise.