Physics

Vanadium

Vanadium

Vanadium Definition Vanadium (symbol V) is a soft, bright-white metallic element that occurs naturally in several minerals. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against furth.....

Read More »

Ilmenite

Ilmenite

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 of the principal dark minerals observed in beach sands. It is a weakly magnetic black or steel-gray solid. From the commercial perspective, ilm.....

Read More »

Brookite

Brookite

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 of the three main forms of titanium dioxide. It forms distinct and unique crystals, and is often associated with the two other m.....

Read More »

About Rutile

About Rutile

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 form of TiO2. It comes in a surprising contrast of distinct habits and colors, making it a very interesting mineral. It has multiple unique crysta.....

Read More »

Titanium

Titanium

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 to corrosion. Its Atomic number 22; atomic weight 47.87; melting point 1,660°C; boiling point 3,287°C; specific gravity 4.54; valence 2, 3.....

Read More »

Iridium

Iridium

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 corrosive to solid iridium, finely divided iridium dust is much more reactive and can be flammable. Its atomic number 77; .....

Read More »

Osmium

Osmium

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 a density of 22.59 g/cm3. Its atomic number 76; atomic weight 190.2; melting point 3,000°C; boiling point 5,000°C; spec.....

Read More »

Ruthenium

Ruthenium

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 metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is inert to most .....

Read More »

Rhodium

Rhodium

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 member of the platinum group. It has only one naturally occurring isotope, 103Rh. Its atomic number 45; atomic weight 102.905; melting point 1,966°C;.....

Read More »

Palladium

Palladium

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 group of elements referred to as the platinum group metals (PGMs). These have similar chemical proper.....

Read More »

Technetium

Technetium

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 small amounts during the radioactive decay of uranium. Its atomic number 43; melting point 2,200°C; specific gravity 11.50.....

Read More »

Hafnium

Hafnium

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 metal and is resistant to corrosion, it is used to control nuclear reactions. Its atomic number 72; atomic weight 178.49; melting .....

Read More »