Search results
Results from the WOW.Com Content Network
A silicate mineral is generally an inorganic compound consisting of subunits with the formula [SiO 2+n] 2n−. Although depicted as such, the description of silicates as anions is a simplification. Balancing the charges of the silicate anions are metal cations, M x+. Typical cations are Mg 2+, Fe 2+, and Na +.
A silicate is any member of a family of polyatomic anions consisting of silicon and oxygen, usually with the general formula [SiO(4-2x)−. 4−x] n, where 0 ≤ x < 2. The family includes orthosilicate SiO4− 4 (x = 0), metasilicate SiO2− 3 (x = 1), and pyrosilicate Si2O6− 7 (x = 0.5, n = 2). The name is also used for any salt of such ...
Category. : Tectosilicates. Tectosilicates are framework silicates which have a three-dimensional framework of silicate tetrahedra with an Si:O ratio of 1:2. This is the largest mineral group comprising nearly 75% of the crust of the Earth. Wikimedia Commons has media related to Tectosilicates.
The mineral olivine (/ ˈɒl.ɪˌviːn /) is a magnesium iron silicate with the chemical formula (Mg, Fe)2 Si O 4. It is a type of nesosilicate or orthosilicate. The primary component of the Earth's upper mantle, [ 9 ] it is a common mineral in Earth's subsurface, but weathers quickly on the surface.
Clay is a very fine-grained geologic material that develops plasticity when wet, but becomes hard, brittle and non–plastic upon drying or firing. [ 2 ][ 3 ][ 4 ] It is a very common material, [ 5 ] and is the oldest known ceramic. Prehistoric humans discovered the useful properties of clay and used it for making pottery. [ 6 ]
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral and ...
Parthéite. Partheite or parthéite is a calcium aluminium silicate and a member of the zeolite group of minerals, a group of silicates with large open channels throughout the crystal structure, which allow passage of liquids and gasses through the mineral. [ 6] It was first discovered in 1979 in rodingitic dikes in an ophiolite zone of the ...
Amphibole (/ ˈæmfəboʊl / AM-fə-bohl) is a group of inosilicate minerals, forming prism or needlelike crystals, [1] composed of double chain SiO. 4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnesium in their structures. Its IMA symbol is Amp. [2] Amphiboles can be green, black, colorless, white, yellow ...