Definition: silicate: A compound containing silicon and oxygen (e.g. olivine). A group of minerals constituting about 95% of the Earth's crust, and containing silicon and oxygen combined with one or more other elements.
SILICATE - The most abundant group of minerals in Earth's crust, the structure of silicates are dominated by the silica tetrahedron, SiO44-, with metal ions occurring between tetrahedra).
SILICATES
Silicates are minerals composed of silicon and oxygen with one or more other elements. Silicates make up about 95% of the Earth's crust.
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silicate asteroid
A reflective type of asteroid which inhabits the inner portions of the asteroid belt.
singularity
The hypothetical condition of a black hole. It is a point of mass which has infinite density.
Silicate
a rock or mineral whose structure is dominated by bonds of silicon and oxygen atoms (ie. olivine).
Silicate: A variety of minerals that always contain silicon (Si) and oxygen (O).
Silicate - A mineral whose crystalline structure is dominated by silicon and oxygen atoms
Sinuous Rille - A winding lunar valley possibly caused by the collapse of a lava tube ...
Borosilicate glass is hard and machine polish is slow so it took about 100 hours per surface (x 3 !) to finish polishing.
Sodium silicate is the common name for a compound sodium metasilicate, Na2SiO3, also known as water glass or liquid glass....
s and graphite
Graphite ...
Silicate (S-type)
Metallic iron mixed with iron-silicates and magnesium-silicates
17 percent ...
Silicates and ferrosilicates minerals [enstatite, MgSiO3; pyroxene, CaMgSi2O6; olivine, (Mg,Fe)2SiO4] in form of microscopic grains
First stony material, combined to form meteorites
300 ...
a silicate mineral, ZrSiO4, diamondlike in appearance, that contains silica silicon dioxide, and the element zirconium. Some zircons in meteorites contain material from the period before the Solar System formed.
zodiac - (n.) ...
The silicate core of the moon would have been consumed by Saturn, leaving the icy boulders to disperse into a ring around the planet. But this process would have formed icy rings one thousand times more massive than the rings are today.
See also: Silicate minerals and Category:Oxide minerals
Oxygen is the most abundant chemical element, by mass, in our biosphere, air, sea and land. Oxygen is the third most abundant chemical element in the universe, after hydrogen and helium.
borosilicate glass (NASA Thesaurus) Low expansion heat resistant glass. Used for Pyrex (trademark). Borsic (tradename) (NASA Thesaurus) Trademark of United Aircraft Products, Inc. for its boron aluminum composite materials.
silicate a compound containing silicon and oxygen (e.g. olivine) sinus literally "bay"; really a small plain solar cycle the approximately 11-year quasi-periodic variation in frequency or number of solar active events.
carbonaceous meteorite type of stone meteorite containing silicates, carbon compounds (giving them their dark color), around 20% water, and sometimes amino acids (the building blocks of proteins used in biological processes of life).
They are composed largely of minerals with high melting points, such as the silicates which form their solid crusts and semi-liquid mantles, and metals such as iron and nickel, which form their cores.
K- and S-class asteroids have moderate albedos and spectral reflectances similar to the stony-iron meteorites, and they are known to contain significant amounts of silicates and metals, including the minerals olivine and pyroxene on their surfaces.
Europa is somewhat similar in bulk composition to the terrestrial planets, being primarily composed of silicate rock.
Stony meteorites are primarily composed of silicates, but up to 25% of their mass can come from iron and nickel.
It is so hot close to the sun that even silicates, which are relatively dense, have difficulty forming there.
Lunine, 1994, "Silicate interactions with ammonia-water fluids on early Titan," Journal of Geophysical Research, vol. 99, no. E2, 3745
D.M. Hunten et al., 1984, "Titan," in Saturn, University of Arizona Press, 671
T.D. Jones and J.S.
P- and T-class asteroids have low albedos and no known meteorite or naturally occurring mineralogical counterparts, but they may contain a large fraction of carbon polymers or organic-rich silicates or both in their surface material.
Detailed study of the exrtinction curve, especially in our galaxy, finds that the grain population needs components which are carbon-rich (graphite or amorphous) and silicate-rich. The largest grains cannot be much larger than 0.
Based on the composition of meteorites found on the Earth, most asteroids may be composed of three materials: mostly (92.8 percent) silicates (stone); metals (5.7 percent) iron and nickel; ...
Computer modelling of the collision between the Earth and the Mars sized impactor shows that the bulk of the mantle of the impacting object and a proportion of the Earth's silicate mantle were ejected into Earth orbit and coalesced to form the Moon.
The composition of the upper mantle is probably quite similar to the iron—magnesium—silicate mixtures known as basalt. You may have seen some dark gray basaltic rocks scattered across Earth's surface, especially near volcanoes.
The grains are believed to be elongated in shape, and aligned with the magnetic field; they are believed to contain graphite or silicate material as well as polycyclic aromatic hydrocarbons.
There is also plenty of olivine (a silicate mineral containing lots of iron) and pyroxene (a silicate mineral rich in magnesium). Many highland rocks are enriched in certain elements that normally are not found in rocks on Earth.
This dust is made up of silicates (like the rocks on Earth) and range in size from a tenth of a micron up to the size of large rocks. Silicates emit most of their radiation at about 10 microns.
carbon grains (soot) and silicate grains (sand) that are about 0.1-1.0 micron in size. Dust grains are a major component of the interstellar medium. Dust blocks visible light causing interstellar extinction.
close in size to our Moon, is thought to have an ice surface 100 km (62 mi) thick, which overlies a silicate surface. The complex array of streaks indicates that the has been fractured.
Instead of containing the anhydrous silicates found in most chondrites, the carbonaceous types have claylike hydrous silicate minerals. They also contain carbonate and sulfate minerals, iron oxides, and sulfur.
Cosmic dust is made up of small grains of silicates, iron, carbon, frozen water and ammonia ice 0.1 to 0.01 microns (μm) in size. Although this cosmic dust only makes up 1% of the mass of the ISM it absorbs and scatters light from stars.
Scientists have suggested that clay-rich phyllosilicate deposits uncovered by OMEGA may have been formed by alteration of surface materials in the very earliest times of Mars. The altered material then may have been buried by subsequent lava flows.
carbon and silicate grains) that are about 0.1-1.0 micron in size. Dust in interstellar space blocks and scatters visible light.
A pyroxene, a complex aluminous silicate of calcium, iron, and magnesium, crystallizing in the monoclinic system, and occurring in many igneous rocks, particularly those of basaltic composition.
Related category
- GEOLOGY AND PLANETARY SCIENCE ...
Meteorites have traditionally been divided into three broad categories: stony meteorites are rocks, mainly composed of silicate minerals; iron meteorites are largely composed of metallic iron-nickel; and, ...
It has a single borosilicate (Pyrex (TM)) mirror that was famously difficult to construct. The mounting is also unique, an equatorial mount that is not a fork, yet permits the telescope to image near the north celestial pole.
The 100 inch Mt.
Oxygen-rich giant stars make silicate dust, while carbon stars make carbon-dust similar to graphite and soot.
They are primarily composed of silicates and strongly absorb, scatter, and polarize visible light at wavelengths comparable to their size, reemitting the light in the far-infrared region of the spectrum.
A transition metal that occurs naturally as the sulfide and silicate. It is used as a protective coating (on other metals) and in the manufacture of various alloys, such as Nichrome and stainless steel.
Symbol: Ni; m.p. 1453°C; b.p. 2732°C; r.d. 8.
Rock of aluminum and calcium silicates found in the lunar highlands.
Aphelion
Point in the earth's orbit where the earth is farthest away from the Sun (summer for us) ...
a stony meteorite containing small, round, silicate granules called chondrules
chromosphere
a layer in a star's atmosphere lying below the corona and above the photosphere ...
Interstellar dust is composed of mictoscopic bits (on the order of a micron in diameter) of carbon and/or silicates. The origin of interstellar dust in unknown, but it seems to be associated with young stars.
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19. Anorthosite
Rock of aluminum and calcium silicates found in the lunar highlands.
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20. Aphelion
Point in the earth's orbit where the earth is farthest away from the Sun (summer for us).
"We detected a large quantity of very small, dirty silicate grains," described astronomer Marc Kuchner of NASA's Goddard Space Flight Center, Greenbelt, MD.
The interior of Venus is believed to be similar to that of the Earth with a metallic core and silicate mantle. Unlike the Earth, Venus has a very small magnetic field apart from that induced by the effect of the solar wind.
Seeing Venus ...
Rather interstellar dust grains are much smaller clumps, on the order of a fraction of a micron across, irregularly shaped, and composed of carbon and/or silicates.
Venus's mantle and crust are thought to be composed of silicates and it core is thought to be nickel-iron.
Dust is made of compounds of carbon and silicon in various forms (graphite grains, silicate grains) and out of ices (such as water, carbon dioxide, ammonia). Temperatures have to be pretty low to have the icy particles (100 K and below).
The vibrant reds, yellows, and blacks on Io's surface are probably sulfur compounds. Some researchers predict that the entire visible surface is sulfur; others feel that silicate lava flows must be present.
The "main belt" asteroids can actually be categorized as divided into two belts, according to confirming data from the current Sloan Digital Sky Survey. The inner belt, centered at 2.8 AU from the Sun, contains silicate-rich asteroids, ...
As a result, Mercury is made out of a large percentage of heavier elements, mainly iron. It is essentially a large metal ball of iron with a very thin silicate crust.
and OH) have also been detected within interstellar gas, along with highly ionized oxygen, nitrogen, carbon and silicon, which are likely remnants of past supernovae. The dust is made up of tiny grains of carbon, iron, and iron-magnesium silicates ...
 See also: Earth, Planet, Solar, Light, Sun
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