[permalink] [id link]
Crystalline boron is a very hard, black material with a high melting point of above 2000 ° C.
from
Wikipedia
Some Related Sentences
Crystalline and is
In the last decade of the 20th century the American poet Denis Garrison developed a two-line 17 syllable variation of the image couplet with his Crystalline, where euphony is the key component and a title thereto optional.
It is stated that he was deactivated in 2336 on Omicron Theta before an attack by the Crystalline Entity, a spaceborne creature which converts life forms to energy for sustenance.
Vernon is a valley bounded by two Crystalline Appalachian ridges known as Pochuck Mountain and Wawayanda Mountain.
Crystalline silica dust can cause silicosis but synthetic amorphous silica gel is indurated, and so does not cause silicosis.
Crystalline α – quartz is by far the most important material for thickness-shear resonators.
Crystalline silica is also known to cause Silicosis, a non-cancerous lung disease.
Crystalline and very
Stephen R. Donaldson, in his Gap Series, proposed a similar system, Symbiotic Crystalline Resonance Transmission, clearly ansible-type technology, but was very difficult to produce and limited to text messages.
Crystalline and hard
Crystalline candies are not as hard as crystals of the mineral variety, but derive their name and their texture from their microscopically organized sugar structure, formed through a process of crystallization, which makes them easy to bite or cut into.
Crystalline and black
Nokturnal Mortum started as death metal band Suppuration in 1991, then turned to black metal and changed name to Crystalline Darkness but " had to change the name back in 1993 / 94 to Nocturnal Mortum because there already existed a band with that name in western underground.
Crystalline and with
Crystalline structures occur in all classes of materials, with all types of chemical bonds.
Crystalline rocks with obsidian's composition include granite and rhyolite.
Beneath the harsh deserts of Saudi Arabia lie dark chambers and complex mazes filled with Crystalline structures, stalactites and stalagmites.
Crystalline materials contain uniform planes of atoms organized with long-range order.
" Destruction of Superflow in Unsaturated 4He Films and the Prediction of a New Crystalline Phase of 4He with Bose-Einstein Condensation ", Physics Letters, Vol.
Crystalline forms are obtained as the amine salt by reacting the free base with a mineral acid, typically HCl.
* This episode establishes Data's backstory, with Data finding out who created him ( Dr. Noonien Soong ) and discovering his evil brother, Lore, and the Crystalline Entity.
* Crystalline troll – Charismatic troll with crystalline skin.
Crystalline nanoparticles made with zeolite are used as a filter to turn crude oil onto diesel fuel at an ExxonMobil oil refinery in Louisiana, a method cheaper than the conventional way.
Crystalline waters abound the area with natural and colorful reefs where a big number of species swarm in panorama of colors.
" Destruction of Superflow in Unsaturated 4He Films and the Prediction of a New Crystalline Phase of 4He with Bose-Einstein Condensation ", Physics Letters, Vol.
Crystalline and high
Crystalline basement rocks, which are exposed in the higher central regions, are the rocks forming Mont Blanc, the Matterhorn, and high peaks in the Pennine Alps and Hohe Tauern.
Crystalline and .
Crystalline ceramic materials are not amenable to a great range of processing.
Crystalline solids exhibit a periodic crystal structure.
Crystalline grains are often embedded within a non-crystalline intergranular phase of grain boundaries.
Lore fails in an attempt to betray the Enterprise to the Crystalline Entity, and Data beams his brother into space at the episode's conclusion.
Crystalline ices were also detected in the proto-planetary disks of ε-Eridani and the isolated Fe star HD 142527 in Lupus.
Crystalline rocks crop out at several capes ; Cretaceous limestones, containing an abundant and specific fauna of gigantic ammonites, occur at Dui on the west coast ; and Tertiary conglomerates, sandstones, marls and clays, folded by subsequent upheavals, are found in many parts of the island.
Crystalline solids are found to have energy bands, instead of or in addition to energy levels.
Crystalline samples do not dissolve at room temperature.
Crystalline tellurium has a structure consisting of parallel infinite spiral chains.
In terms of physical geography, nearly all of Hardyston ( excluding the portion of the Township west of Hamburg along Route 94 ) lies within the New York-New Jersey Highlands, part of the greater Crystalline Appalachians that extend as far south as the Blue Ridge Mountains.
Crystalline structures and the concept of entropy became of particular interest to him, and informed a number of sculptures completed during this period, including Alogon 2.
The Blue Ridge, Piedmont, Adirondack, and New England Provinces are collectively known as the Crystalline Appalachians, because they consist of Precambrian and Cambrian igneous and metamorphic rocks.
boron and is
Because boron is produced entirely by cosmic ray spallation and not by stellar nucleosynthesis, it is a low-abundance element in both the solar system and the Earth's crust.
Chemically uncombined boron, which is classed as a metalloid, is not found naturally on Earth.
Industrially, very pure boron is produced with difficulty, as boron tends to form refractory materials containing small amounts of carbon or other elements.
Several allotropes of boron exist: amorphous boron is a brown powder and crystalline boron is black, extremely hard ( about 9. 5 on the Mohs scale ), and a poor conductor at room temperature.
Elemental boron is used as a dopant in the semiconductor industry.
Natural boron is composed of two stable isotopes, one of which ( boron-10 ) has a number of uses as a neutron-capturing agent.
Experiments indicate a role for boron as an ultratrace element in animals, but the nature of its role in animal physiology is unknown.
They showed by oxidizing boron with air that boric acid is an oxidation product of boron.
Compressing boron above 160 GPa produces a boron phase with an as yet unknown structure, and this phase is a superconductor at temperatures 6 – 12 K.
Cosmic ray spallation ( fragmentation ) of carbon, nitrogen, and oxygen is important to the production of lithium, beryllium and boron.
It is generally agreed that no heavier elements than boron were produced in the Big Bang.
Glasses containing both boron and phosphorus ( borophosphosilicate glass, BPSG ) undergo viscous flow at lower temperatures ; around 850 ° C is achievable with glasses containing around 5 weight % of both constituents, but stability in air can be difficult to achieve.
In this respect boron carbide is similar to the boron rich borides.
0.167 seconds.