Plutonium occurs in a variety of allotropes, even at ambient pressure. These allotropes differ widely in crystal structure and density; the α and δ allotropes...

point, the liquid plutonium has very high viscosity and surface tension compared to other metals. Plutonium normally has six allotropes and forms a seventh...

ytterbium have three allotropes. Praseodymium, neodymium, gadolinium and terbium have two allotropes. Plutonium has six distinct solid allotropes under "normal"...

density of plutonium gave inconsistent results. At first contamination was suspected, but it was soon determined that there were multiple allotropes of plutonium...

density of a material at a constant temperature can be changed by varying the pressure or tension or by changing crystal structure (see allotropes of plutonium)...

increasing in temperature. This was a strong indication of multiple allotropes of plutonium; but was initially considered too bizarre to be true. Further...

reality after it was initially proposed by Edward Teller. Of the several allotropes of plutonium, the metallurgists preferred the malleable δ (delta) phase...

the cause, but it was soon determined that there were multiple allotropes of plutonium. The brittle α phase that exists at room temperature changes to...

demon core was a sphere of plutonium that was involved in two fatal radiation accidents when scientists tested it as a fissile core of an early atomic bomb...

not only because of its toxicity, but because plutonium has many different metallic phases, also known as allotropes. As plutonium cools, changes in...

There were found to be six allotropes of plutonium, more than any other metal, and its melting point turned out to be hundreds of degrees lower than uranium...

stable allotrope, and the reference state for carbon is graphite, because the structure of graphite is more stable than that of the other allotropes. In...

known allotropes that exist at room temperature. These allotropes are known as the amorphous and the crystalline allotropes. The amorphous allotrope is a...

stockpile size. He also provided metallurgical information about the allotrope of plutonium used in the final weapon, and information about its stabilization...

fourth allotrope have been made, but they are so far not proven. This multiplicity of allotropes is common among the actinides. The crystal structures of neptunium...

with diverse molecular configurations called allotropes. The three relatively well-known allotropes of carbon are amorphous carbon, graphite, and diamond...

structures: these are called allotropes. For example, diamond and graphite are two allotropes of carbon. The metallicity of an element can be predicted...

(May 30, 1916 – May 5, 1957) was an American chemist who co-discovered plutonium, along with Glenn T. Seaborg, Edwin McMillan, and Arthur Wahl. During...

ISBN 978-0-12-352651-9. Steudel, Ralf; Eckert, Bodo (2003). Solid Sulfur Allotropes Sulfur Allotropes. Topics in Current Chemistry. Vol. 230. pp. 1–80. doi:10.1007/b12110...

Metallic plutonium has several different solid allotropes. The δ phase is the least dense and most easily machinable. It is formed at temperatures of 310–452 °C...

nitrogen gas produced "active nitrogen", a monatomic allotrope of nitrogen. The "whirling cloud of brilliant yellow light" produced by his apparatus reacted...

allotropes include rhombic sulfur and monoclinic sulfur. Rhombic sulfur is the more stable of the two allotropes. Monoclinic sulfur takes the form of...

agents. Phosphorus has several allotropes that exhibit strikingly diverse properties. The two most common allotropes are white phosphorus and red phosphorus...

of high explosives). Plutonium has seven temperature-dependent solid allotropes. Each possesses a different density and crystal structure. Alloys of plutonium...

photosynthetic activities of autotrophs such as cyanobacteria, chloroplast-bearing algae and plants. A much rarer triatomic allotrope of oxygen, ozone (O 3)...

burn with a blue or violet colour. Caesium exists in the form of different allotropes, one of them a dimer called dicaesium. Caesium metal is highly reactive...

maximum energy of 803 keV. Polonium is a radioactive element that exists in two metallic allotropes. The alpha form is the only known example of a simple cubic...

thermodynamically stable allotropes at standard pressure, but several other crystal structures are known at higher pressures. The general trend is one of increasing...

produced with difficulty because of contamination by carbon or other elements that resist removal. Several allotropes exist: amorphous boron is a brown...

supposed yellow allotrope of antimony, generated only by oxidation of stibine (SbH3) at −90 °C, is also impure and not a true allotrope; above this temperature...