Physics

Ilmenite Definition Ilmenite is a lustrous black to brownish rhombohedral mineral that is an ore of titanium. Ilmenite occurs in igneous rocks and is one…

Brookite Definition Brookite (Tio2) is a reddish-brown to black mineral consisting of titanium oxide in orthorhombic crystalline form: occurs in silica veins. It is one…

About Rutile Definition Rutile is a lustrous red, reddish-brown, or black tetragonal mineral that is an ore of titanium. It is the most common natural…

Titanium Definition Titanium is a shiny, white metallic element that occurs in all kinds of rocks and soils. It is lightweight, strong, and highly resistant…

Iridium Definition Iridium (symbol Ir) is a rare, whitish-yellow element that is the most corrosion-resistant metal known. Although only certain molten salts and halogens are…

Osmium Definition Osmium is a hard, brittle, bluish-white metallic element that is the densest naturally occurring element. It is the densest naturally occurring element, with…

Ruthenium Definition Ruthenium (symbol Ru) is a rare, silvery-gray metallic element that is hard, brittle, and very resistant to corrosion. It is a rare transition…

Rhodium Definition Rhodium (Rh) is a rare, silvery-white metallic element that is hard, durable, and resistant to acids. It is a noble metal and a…

Palladium Definition Palladium (Pd) is a malleable, ductile, grayish-white metallic element that occurs naturally with platinum. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a…

Technetium Definition Technetium is a silvery-gray, radioactive metallic element. It was the first element to be artificially made, and it is produced naturally in extremely…

Hafnium Definition Hafnium is a bright, silvery metallic element that occurs in zirconium ores, with symbol Hf. Because hafnium absorbs neutrons better than any other…

Scandium Definition Scandium is a soft, silvery, very lightweight metallic element that is found in various rare minerals and is a byproduct in the processing…