Citizendia
Your Ad Here

For the artificial intelligence androids of the 1990s science fiction series Space: Above and Beyond, see Silicate (AI)

A silicate is a compound containing an anion in which one or more central silicon atoms are surrounded by electronegative ligands. An android is a Robot designed to resemble a human usually both in appearance and behavior Space Above and Beyond (abbreviated as SAAB) was a short-lived 1990s American Science fiction Television show on the Silicates were a race of Androids created by humanity to be servants in the 1995 - 1996 Television series Space Above and Beyond An ion is an Atom or Molecule which has lost or gained one or more Valence electrons giving it a positive or negative electrical charge Silicon (ˈsɪlɪkən or /ˈsɪlɪkɒn/ silicium is the Chemical element that has the symbol Si and Atomic number 14 In Chemistry, a ligand is either an Atom, Ion, or Molecule (see also Functional group) that bonds to a central metal generally This definition is broad enough to include species such as hexafluorosilicate ("fluorosilicate"), [SiF6]2−, but the silicate species that are encountered most often consist of silicon with oxygen as the ligand. Silicon (ˈsɪlɪkən or /ˈsɪlɪkɒn/ silicium is the Chemical element that has the symbol Si and Atomic number 14 Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the Silicate anions, with a negative net electrical charge, must have that charge balanced by other cations to make an electrically neutral compound.

Silica, or silicon dioxide, SiO2, is sometimes considered a silicate, although it is the special case with no negative charge and no need for counter-ions. The Chemical compound silicon dioxide, also known as silica or silox (from the Latin " Silex " is an Oxide Silica is found in nature as the mineral quartz, and its polymorphs. A mineral is a naturally occurring substance formed through geological processes that has a characteristic chemical composition a highly ordered atomic structure and specific Quartz (from German) is the most abundant Mineral in the Earth 's Continental crust (although Feldspar is more common in Polymorphism in Materials science is the ability of a solid material to exist in more than one form or Crystal structure

In the vast majority of silicates, including silicate minerals, the Si atom shows tetrahedral coordination by 4 oxygens. The silicate minerals make up the largest and most important class of rock-forming Minerals They are classified based on the structure of their silicate Ion group A tetrahedron (plural tetrahedra) is a Polyhedron composed of four triangular faces three of which meet at each vertex. In different minerals the tetrahedra show different degrees of polymerization: they occur singly, joined together in pairs, in larger finite clusters including rings, in chains, double chains, sheets, and three-dimensional frameworks. A mineral is a naturally occurring substance formed through geological processes that has a characteristic chemical composition a highly ordered atomic structure and specific A polymer is a large Molecule ( Macromolecule) composed of repeating Structural units typically connected by Covalent Chemical bonds The minerals are classified into groups based on these anion structures; a list is given below.

Silicon may adopt octahedral coordination by 6 oxygens at very high pressure, as in the dense stishovite polymorph of silica that is found in the lower mantle of the Earth, and which is also formed by shock during meteorite impacts. An octahedron (plural octahedra is a Polyhedron with eight faces Stishovite (after SM Stishov 20th-century Russian mineralogist is an extremely hard dense Tetragonal form ( polymorph) of Silicon dioxide. The Chemical compound silicon dioxide, also known as silica or silox (from the Latin " Silex " is an Oxide The mantle is a part of an Astronomical object. The interior of the Earth, similar to the other Terrestrial planets, is Chemically divided A meteorite is a natural object originating in Outer space that survives an impact with the Earth 's surface Lack of space around the oxygen atoms makes this coordination for Si very rare at normal pressure, but it is known in the hexahydroxysilicate anion, [Si(OH)6]2−, as found in the mineral thaumasite. Thaumasite is a silicate mineral with an unusual composition Ca 3 Si ( C[[oxygen O]]3( SO sub>4(O H

Silicate rock

In geology and astronomy, the term silicate is used to denote types of rock that consist predominantly of silicate minerals. Geology (from Greek γη gê, "earth" and λόγος Logos, "speech" lit Astronomy (from the Greek words astron (ἄστρον "star" and nomos (νόμος "law" is the scientific study In Geology, rock is a naturally occurring aggregate of Minerals and/or Mineraloids The Earth's outer solid layer the ‘ Lithosphere The silicate minerals make up the largest and most important class of rock-forming Minerals They are classified based on the structure of their silicate Ion group Such rocks include a wide range of igneous, metamorphic and sedimentary types. Igneous rocks (etymology from Latin ignis, fire are rocks formed by solidification of cooled Magma (molten rock Metamorphic rock is the result of the transformation of an existing rock type the protolith, in a process called Metamorphism, which means "change Sedimentary rock is one of the three main rock types (the others being igneous and Metamorphic rock) Most of the Earth's mantle and crust are made up of silicate rocks. The mantle is a part of an Astronomical object. The interior of the Earth, similar to the other Terrestrial planets, is Chemically divided In Geology, a crust is the outermost solid shell of a planet or moon The same is true of the Moon and the other rocky planets. A planet, as defined by the International Astronomical Union (IAU is a celestial body Orbiting a Star or stellar remnant that is

On Earth, a wide variety of silicate minerals occur in an even wider range of combinations as a result of the processes that form and re-work the crust. These processes include partial melting, crystallization, fractionation, metamorphism, weathering and diagenesis. Melting is a process that results in the phase change of a substance from a Solid to a Liquid. Crystallization is the (natural or artificial process of formation of solid Crystals precipitating from a homogeneous --> identical Solution Fractionation is a Separation process in which a certain quantity of a Mixture (solid liquid solute or suspension is divided up in a number of smaller quantities Metamorphism can be defined as the solid state recrystallisation of pre-existing rocks due to changes in heat and/or pressure and/or introduction of fluids i Weathering is the decomposition of earth rocks, Soils and their Minerals through direct contact with the planet's Atmosphere. In Geology and Oceanography, diagenesis is any chemical physical or biological change undergone by a Sediment after its initial deposition and during Living things also contribute to the silicate cycle near the Earth's surface. A type of plankton known as diatoms construct their exoskeletons, known as tests, from silica. Plankton consist of any drifting Organisms ( Animals Plants Archaea, or Bacteria) that inhabit the Pelagic zone of Diatoms ( Greek: (dia = "through" + (temnein = "to cut" i An exoskeleton is an external Skeleton that supports and protects an animal's body in contrast to the internal Endoskeleton of for example a Human. The tests of dead diatoms are a major constituent of deep ocean sediment

Silicates have been observed in space, around evolved stars and planetary nebulae such as NGC 6302. The deep sea, or deep layer, is the lowest layer in the Ocean, existing below the Thermocline, at a depth of 1000 fathoms or more Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of A planetary nebula is an Emission nebula consisting of a glowing shell of Gas and plasma formed by certain types of Stars when they die NGC 6302 (also called the Bug Nebula or Butterfly Nebula) is a bipolar Planetary nebula in the constellation Scorpius. They are found in both amorphous form and crystalline form, though the range of types that have been found is far smaller than those found on Earth.

Mineralogy

Main article: Silicate minerals

Mineralogically, silicate minerals are divided according to structure of their silicate anion into the following groups:

Note that tectosilicates can only have additional cations if some of the silicon is replaced by a lower-charge cation such as aluminium, to give a negative charge overall. WikipediaNaming This substitution can also take place in other types of silicate.

Some rare minerals have more than one type of anion coexisting in their crystal structures, or complex-shaped anions that are intermediate between the simple types above.

Dictionary

silicate

-noun

  1. (chemistry) Any salt of silica or of one of the silicic acids; any mineral composed of silicates
© 2009 citizendia.org; parts available under the terms of GNU Free Documentation License, from http://en.wikipedia.org
 Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic