Period 6 element form, as an X-ray radiocontrast agent for imaging the human gastrointestinal tract. Soluble barium compounds are poisonous due to release of the soluble barium ion, and have been used as rodenticides. New uses for barium continue to be sought. It is a component of some "high temperature" YBCOsuperconductors, and electroceramics. The lanthanide or lanthanoid (IUPAC nomenclature) series comprises the fifteen metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. These fifteen elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. The informal chemical symbol Ln is
Stieff Silver silverware production was moved to Providence RI while sterling silver hollow ware and pewter would remain at the Stieff factory. Manufacturing ceased in 1999 in Baltimore, as operations were consolidated at a Lenox plant in Smithfield RI and later to New Jersey. Today the name survives as a brand of Lifetime Brands Inc., Lifetime bought Kirk-Stieff and other silver brands from Lenox in July 2007. Sale price was 8.775 million dollars (US Dollars) The silver is now made in Puerto Rico, but only as Sterling Flatware (unchased). Of the Stieff patterns, only the pattern Stieff Rose is still made, and