Silicates
In chemistry, a silicate is any member of a family of 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 anions, such as sodium metasilicate; or any ester containing the corresponding chemical group, such as tetramethyl orthosilicate.Silicate anions are often large polymeric molecules with an extense variety of structures, including chains and rings (as in polymeric metasilicate [SiO2−3]n), double …
WikipediaPublications
PICES: North Pacific Marine Science Organization · 29 February 2024 English
NPRB directs research towards species, processes, and dynamics in the marine ecosystems of Alaska, including the Gulf of Alaska, the Bering Sea, the Aleutian Islands, and the Chukchi and Beaufort …
Quality Days, Extracted Seawater, Dissolved Silicates Concentration, Habitat Mediated Flow, Sediment Transport …
IISD: International Institute for Sustainable Development · 3 November 2023 French
Practical guidance to support developing countries in accurately pricing mineral sales for the purposes of revenue collection.In the mining sector, royalties and corporate income taxes are generally based on the …
latéritisation de différentes roches riches en silicates d’aluminium, comme les granits, les gneiss, les …
MiningWatch Canada · 15 September 2023 French
Lors de l’étape de la planification, tous les aspects de la future mine sont examinés et planifiés, notamment le choix des procédés d’extraction et de séparation du minerai, les besoins …
neutralisants (carbonates, hydroxydes, minéraux silicatés), n’en est pas moins toxique pour l’environnement …
Santé et Services sociaux Québec · 6 April 2023 French
Depuis sa première parution en juillet 2016, le Guide d’intervention - Protection des sols et réhabilitation des terrains contaminés constitue le volet technique de la Politique de protection des sols …
définit l’amiante comme étant la forme fibreuse des silicates minéraux appartenant aux roches métamorphiques … définit l’amiante comme étant la forme fibreuse des silicates minéraux appartenant aux roches métamorphiques … définit l’amiante comme étant la forme fibreuse des silicates minéraux appartenant aux roches métamorphiques … définit l’amiante comme étant la forme fibreuse des silicates minéraux appartenant aux roches métamorphiques …
NWMO: Nuclear Waste Management Organization · 17 March 2023 English
In order to address the issue of differing water contents in the samples, the water content was subtracted from the total oxide composition and the remainder was used to “adjust” …
presence of a higher content of x-ray invisible silicates. A SiO2/Al2O3 ratio of approximately 3.5 was also … samples (e.g., quartz, clays, feldspar or amorphous silicates) and are actually closer to those observed for …
NWMO: Nuclear Waste Management Organization · 17 March 2023 English
In order to address the issue of differing water contents in the samples, the water content was subtracted from the total oxide composition and the remainder was used to “adjust” …
presence of a higher content of x-ray invisible silicates. A SiO2/Al2O3 ratio of approximately 3.5 was also … samples (e.g., quartz, clays, feldspar or amorphous silicates) and are actually closer to those observed for …
NWMO: Nuclear Waste Management Organization · 16 March 2023 English
The grain size of the quartz is inequigranular, and some of the crystals are recrystallized into smaller interlobate crystals near to contact with the host rock and the alkali feldspar. …
and magnetite have a light grey reflectance. Silicates are usually dark grey under reflected light and …
NWMO: Nuclear Waste Management Organization · 16 March 2023 English
Anhedral crystals of plagioclase (Photomicrograph 1a) prevail over the fine-grained flakes of biotite and the subordinate crystals of quartz in the groundmass. [...] The quartz phenocrystals are homogeneously dispersed within …
and magnetite have a light grey reflectance. Silicates are usually dark grey under reflected light and …
City of Ottawa, Ontario · 2023 English
Asbestos-containing materials (ACM) are fibrous hydrated silicates and can be found in building materials as either …
IRSST: Institut de recherche Robert-Sauvé en santé et en sécurité du travail · 20 October 2022 English
2) Without knowing the number of the sample, repeat the count on the reference slides and estimate the intralaboratory and intercounter coefficient of variation, Sr. [...] Place the wedge, dust …
«asbestos» designates the fibrous forms of the mineral silicates belonging to metamorphic rocks of the serpentine …
