Iridium
Iridium is a chemical element with symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second dense...
Iridium - Wikipedia
If there had been no asteroid collision 65 million years ago, would the human species even exist?
If there had been no asteroid collision 65 million years ago, would the human species even exist?
Massive, Ancient Asteroid Crater may Provide Clues to Dinosaur Extinction
Scientists digging deep into the Gulf of Mexico say they have cracked into a crater, formed some 65 million years ago after a massive asteroid struck the earth. The 33-member team of scientists from a...
Scientists Get First Glimpse Of Conductivity That Could Break Size Barriers For Memory
Scientists from Stanford University and the Department of Energy’s SLAC National Accelerator Laboratory have made the first direct images showing that electrical currents can flow along the boundaries...
Asteroid Impact, Volcanism Were One-Two Punch For Dinosaurs
For 35 years, paleontologists and geologists have debated the role these two global events played in the last mass extinction, with one side claiming the eruptions were irrelevant, and the other side ...
Iridium
Newer and better iridium video at: http://www.youtube.com/watch?v=cuovE4OQi2g Iridium is element number 77 on the periodic table. More elements at at http://...
Isotopes of iridium
There are two natural isotopes of iridium (Ir), and 34 radioisotopes, the most stable radioisotope being Ir with a half-life of 73.83 days, and many nuclear isomers, the most stable of which is Ir wit...
Isotopes of iridium - Wikipedia
Cretaceous-Tertiary extinction event
The Cretaceous–Paleogene (K–Pg) extinction event, formerly known as the Cretaceous–Tertiary (K–T) extinction, was a mass extinction of some three-quarters of plant and animal species on Earth—includin...
Cretaceous-Tertiary extinction event - Wikipedia
Smithson Tennant
Smithson Tennant FRS (30 November 1761 - 22 February 1815) was an English chemist.Tennant is best known for his discovery of the elements iridium and osmium, which he found in the residues from the so...
Smithson Tennant - Wikipedia
Alvarez hypothesis
The Alvarez hypothesis posits that the mass extinction of the dinosaurs and many other living things was caused by the impact of a large asteroid on the Earth sixty-five million years ago, called the ...
Alvarez hypothesis - Wikipedia
Scientists Get First Glimpse Of Conductivity That Could Break Size Barriers For Memory
Scientists from Stanford University and the Department of Energy’s SLAC National Accelerator Laboratory have made the first direct images showing that electrical currents can flow along the boundaries...
Cativa process
The Cativa process is a method for the production of acetic acid by the carbonylation of methanol. The technology, which is similar to the Monsanto process, was developed by BP Chemicals and is under...
Cativa process - Wikipedia
Osmiridium
Osmiridium, also known as iridosmium or iridosmine, is a natural alloy of osmium and iridium, with traces of other platinum group metals. Osmiridium has been defined as containing a higher proportion ...
Tetrairidium dodecacarbonyl
Tetrairidium dodecacarbonyl is the chemical compound with the formula Ir4(CO)12. This tetrahedral cluster is the most common and most stable "binary" carbonyl of iridium. This air-stable species is o...
Tetrairidium dodecacarbonyl - Wikipedia
Iridium anomaly
The term iridium anomaly commonly refers to an unusual abundance of the chemical element iridium in a layer of rock strata, often taken as evidence of an extraterrestrial impact event because of the c...
Iridium tetrafluoride
Iridium(IV) fluoride is a chemical compound of iridium and fluorine, with the chemical formula IrF4 and is a dark brown solid. Early reports of IrF4 prior to 1965 are questionable and appear to descri...
Crabtree's catalyst
Crabtree's catalyst is an organoiridium compound with the formula C8H12IrP(C6H11)3C5H5N]PF6. It is a homogeneous catalyst for hydrogenation and hydrogen-transferreactions, developed by Robert H. Crab...
Crabtree's catalyst - Wikipedia
Iridium tetroxide
Iridium tetroxide (IrO4, Iridium(VIII) oxide) is a binary compound of oxygen and iridium in oxidation state +VIII. This compound was formed by photochemical rearrangement of [(ηO2)IrO2] in solid ar...
Iridium tetroxide - Wikipedia
Iridium(III) chloride
Iridium(III) chloride is the inorganic compound with the formula IrCl3. This material is relatively rare, but the related hydrate is useful for preparing other iridium compounds. The anhydrous salt i...
K-T boundary
The Cretaceous–Paleogene (K–Pg) boundary, formerly known as the Cretaceous–Tertiary (K–T) boundary, is a geological signature, usually a thin band. It defines the end of the Mesozoic Era, and is usua...
K-T boundary - Wikipedia
Shiva crater
The Shiva crater is a geologic structure, which is hypothesized by Sankar Chatterjee and colleagues to be a 500 km in diameter impact structure. This geologic structure consists of the Bombay High an...
Shiva crater - Wikipedia
Iridium hexafluoride
Iridium hexafluoride, also iridium(VI) fluoride, (IrF6) is a compound of iridium and fluorine and one of the seventeen known binary hexafluorides. It is one of only a few compounds with iridium in its...
Iridium hexafluoride - Wikipedia
Iridium(V) fluoride
Iridium(V) fluoride, IrF5, is a chemical compound of iridium and fluorine, first described by Neil Bartlett in 1965. A highly reactive yellow low melting solid, it has a tetrameric structure, Ir4F20, ...
Iridium(V) fluoride - Wikipedia
Chicxulub crater
The Chicxulub crater (/ˈtʃiːkʃʉluːb/; [tʃʼikʃuluɓ]) is a prehistoric impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is located near the town of Chicxulub, after which the ...
Chicxulub crater - Wikipedia