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| - Silicates are a fictional race of androids created by humanity to be servants in the 1995–1996 television series Space: Above and Beyond.
- Silicate is an ore.
- Silicates were a large class of minerals based on a tetrahedral silicon-oxygen unit (SiO4). The spaceborne organism nicknamed "Junior", discovered by the USS Enterprise-D in 2367, had an outer shell made from silicates, actinides, and carbonaceous chondrite. (TNG: "Galaxy's Child" ) The lifeforms on L-S VI were based on silicates rather than carbon. (DS9: "The Alternate") In 2374, the Silver Blood USS Voyager collected silicates from a comet in the Podaris sector. (VOY: "Course: Oblivion")
- Silicate was an organic material. The cactus-like trees on the planet Altor 14 developed silicate bark to defend themselves from the planet's animal life.
- A silicate is a compound containing an ion in which one or more central silicon atoms are surrounded by electronegative ligands. 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. Silicate anions, with a negative net electrical charge, must have that charge balanced by other cations to make an electrically neutral compound.
- A silicate is a compound containing an anion in which one or more central silicon atoms are surrounded by electronegative ligands. 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. Silicate anions, with a negative net electrical charge, must have that charge balanced by other cations to make an electrically neutral compound.
- A silicate is a compound containing a silicon bearing anion. The great majority of silicates are oxides, but hexafluorosilicate ([SiF6]2−) and other anions are also included. This article focuses mainly on the Si-O anions. Silicates comprise the majority of the earth's crust, as well as the other terrestrial planets, rocky moons, and asteroids. Sand, Portland cement, and thousands of minerals are examples of silicates.
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| abstract
| - A silicate is a compound containing an anion in which one or more central silicon atoms are surrounded by electronegative ligands. 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. 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. Silica is found in nature as the mineral quartz, and its polymorphs. In the vast majority of silicates, including silicate minerals, the Si atom shows tetrahedral coordination by 4 oxygens. 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. 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. 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.
- Silicates are a fictional race of androids created by humanity to be servants in the 1995–1996 television series Space: Above and Beyond.
- A silicate is a compound containing an ion in which one or more central silicon atoms are surrounded by electronegative ligands. 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. 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. Silica is found in nature as the mineral quartz, and its polymorphs. In the vast majority of silicates, including silicate minerals, the Si atom shows tetrahedral coordination by 4 oxygens. 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. 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. 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.
- Silicate is an ore.
- Silicates were a large class of minerals based on a tetrahedral silicon-oxygen unit (SiO4). The spaceborne organism nicknamed "Junior", discovered by the USS Enterprise-D in 2367, had an outer shell made from silicates, actinides, and carbonaceous chondrite. (TNG: "Galaxy's Child" ) The lifeforms on L-S VI were based on silicates rather than carbon. (DS9: "The Alternate") In 2374, the Silver Blood USS Voyager collected silicates from a comet in the Podaris sector. (VOY: "Course: Oblivion")
- Silicate was an organic material. The cactus-like trees on the planet Altor 14 developed silicate bark to defend themselves from the planet's animal life.
- A silicate is a compound containing a silicon bearing anion. The great majority of silicates are oxides, but hexafluorosilicate ([SiF6]2−) and other anions are also included. This article focuses mainly on the Si-O anions. Silicates comprise the majority of the earth's crust, as well as the other terrestrial planets, rocky moons, and asteroids. Sand, Portland cement, and thousands of minerals are examples of silicates. Silicate compounds, including the minerals, consist of silicate anions whose charge is balanced by various cations. Myriad silicate anions can exist, and each can form compounds with many different cations. Hence this class of compounds is very large. Both minerals and synthetic materials fit in this class.
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