ettringite वाक्य
उदाहरण वाक्य
मोबाइल
- It occurs in association with afwillite, calcite, larnite, spurrite, halite, brownmillerite, hydrocalumite, mayenite and ettringite.
- For example, it is reported that copper immobilization at high pH can be achieved through formation of CSH / CAH and ettringite.
- In the presence of anionic groups such as sulphate, carbonate or chloride, AFm phases and AFt or ettringite phases can form.
- Upon analyzing the structure of both ettringite and thaumasite, it was deduced that both minerals have hexagonal structures, but different space groups.
- N'Chwaning is known to produce high-quality mineral specimens of rhodochrosite, manganite, ettringite, inesite, jouravskite and other minerals.
- Hydration produces ettringite, and specialized physical properties ( such as expansion or rapid reaction ) are obtained by adjustment of the availability of calcium and sulfate ions.
- Ettringite crystal system is trigonal, crystals are elongated and in a needle like shape, occurrence of disorder or twining is common, which affects the intercolumn material.
- When the ratio is intermediate, only a portion of the ettringite converts to AFm and both can coexist, while ettringite is unlikely to convert to AFm at high ratios.
- When the ratio is intermediate, only a portion of the ettringite converts to AFm and both can coexist, while ettringite is unlikely to convert to AFm at high ratios.
- Minerals associated with brownmillerite in the Mayen locality include calcite, ettringite, wollastonite, larnite, mayenite, gehlenite, diopside, pyrrhotite, grossular, spinel, afwillite, jennite, portlandite and jasmundite.
- Further X-ray studies ensued; namely Wellin ( 1956 ) which determined the crystal structure of thaumasite, and Besjak & Jelenic ( 1966 ) which gave affirmation of the structure nature of ettringite.
- It occurs with calcite, ettringite, wollastonite, larnite, brownmillerite, gehlenite, diopside, pyrrhotite, grossular, spinel, afwillite, jennite, portlandite, jasmundite, melilite, kalsilite and corundum in the limestone xenoliths.
- Ettringite crystals have a P31c with a = 11.224 ? c = 21, 108 ? while thaumasite crystals fall into space group P6 3 with a = 11.04 ? c = 10.39 ?
- Ongoing research on ettringite and cement phase minerals is in general to find ways to immobilize wastes and heavy metals from soils and the environment; this can be done by use of the proper cement phase forming mineral by use of lattice to extract according elements.
- The mineral ettringite has a structure that runs parallel to the " c " axis-the needle axis-; in the middle of these two lie the sulfate ions and H 2 O molecules, the space group is " P31c ".
- An ettringite sample extracted from Scawt Hill was analysed by C . E . Tilley, the crystal was 1.1 x 0.8 0.5 mm, with specific gravity of 1.772?.002, the density was determined by immersing the sample in a solution of carbon tetrachloride mixed with bromoform.
- In the cement system, the presence of ettringite depends on the ratio of calcium sulfate to tri-calcium aluminate ( C3A ); when this ratio is low, ettringite forms during early hydration and then converts to the calcium aluminate monosulfate ( AFm phase or ( Al 2 O 3-Fe 2 O 3-mono ) ).
- In the cement system, the presence of ettringite depends on the ratio of calcium sulfate to tri-calcium aluminate ( C3A ); when this ratio is low, ettringite forms during early hydration and then converts to the calcium aluminate monosulfate ( AFm phase or ( Al 2 O 3-Fe 2 O 3-mono ) ).
- It is suggested that the crystal morphology of ettringite Ca 6 Al 2 ( SO 4 ) 3 ( OH ) 12 ?6H 2 O can incorporate a variety of divalent ions : Cu 2 +, Pb 2 +, Cd 2 + and Zn 2 +, which can substitute for the Ca 2 + by incorporating these ions into the lattice.
- Differences between structures of ettringite and thaumasite arise from the columns of cations and anions : Ettringite cation columns are composed of Ca 3 [ Al ( OH ) 6 ?2H 2 O ] 3 +, which run parallel to the " c " axis, and the other columns of sulfate anions and water molecules in channels parallel to these columns.
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