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  2. Silicate - Wikipedia

    en.wikipedia.org/wiki/Silicate

    With two shared oxides bound to each silicon, cyclic or polymeric structures can result. The cyclic metasilicate ring Si 6 O 12− 18 is a hexamer of SiO 3 2-. Polymeric silicate anions of can exist also as long chains. In single-chain silicates, which are a type of inosilicate, tetrahedra link to

  3. Silica cycle - Wikipedia

    en.wikipedia.org/wiki/Silica_cycle

    The formation of silicate clays removes reactive silica from the pore waters of sediment, increasing the concentration of silica found in the rocks that form in these locations. [ 18 ] Silicate weathering also appears to be a dominant process in deeper methanogenic sediments, whereas reverse weathering is more common in surface sediments, but ...

  4. Biogeochemical cycle - Wikipedia

    en.wikipedia.org/wiki/Biogeochemical_cycle

    A biogeochemical cycle, or more generally a cycle of matter, [1] is the movement and transformation of chemical elements and compounds between living organisms, the atmosphere, and the Earth's crust.

  5. Category:Cyclosilicates - Wikipedia

    en.wikipedia.org/wiki/Category:Cyclosilicates

    Cyclosilicates are ring silicates which contain rings of linked SiO 4 tetrahedra. The Si:O ratio is 1:3. The Si:O ratio is 1:3. Three configurations can occur: the Si 3 O 9 , the Si 4 O 12 and the Si 6 O 18 rings.

  6. Silicate mineral - Wikipedia

    en.wikipedia.org/wiki/Silicate_mineral

    Lithium aluminium silicate mineral spodumene. Silicate minerals are rock-forming minerals made up of silicate groups. They are the largest and most important class of minerals and make up approximately 90 percent of Earth's crust. [1] [2] [3] In mineralogy, silica (silicon dioxide, SiO 2) is usually considered a silicate mineral rather than an ...

  7. Carbonate–silicate cycle - Wikipedia

    en.wikipedia.org/wiki/Carbonate–silicate_cycle

    The carbonate-silicate cycle is the primary control on carbon dioxide levels over long timescales. [3] It can be seen as a branch of the carbon cycle , which also includes the organic carbon cycle , in which biological processes convert carbon dioxide and water into organic matter and oxygen via photosynthesis .

  8. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet's primary products include digital flash cards, matching games, practice electronic assessments, and live quizzes. In 2017, 1 in 2 high school students used Quizlet. [ 4 ] As of December 2021, Quizlet has over 500 million user-generated flashcard sets and more than 60 million active users.

  9. Catenation - Wikipedia

    en.wikipedia.org/wiki/Catenation

    In chemistry, catenation is the bonding of atoms of the same element into a series, called a chain. [1] A chain or a ring may be open if its ends are not bonded to each other (an open-chain compound), or closed if they are bonded in a ring (a cyclic compound). The words to catenate and catenation reflect the Latin root catena, "chain".