Yttrium lithium fluoride (LiYF4, sometimes abbreviated YLF) is a yellowish transparent birefringent crystal, typically doped with neodymium or praseodymium and used as a gain medium in solid-state lasers.
The compounds of every Wikipedia article carrying a Chembox or a Drugbox, refreshed daily, with the values their infoboxes give. The pages need JavaScript; the API does not.