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- Q167525 subject Q6142193.
- Q167525 subject Q7215190.
- Q167525 subject Q7318041.
- Q167525 abstract "Hydrotalcite is a layered double hydroxide of general formula Mg6Al2CO3(OH)16·4(H2O), whose name is derived from its resemblance with talc and its high water content. The layers of the structure may stack in different ways, to produce a 3-layer rhombohedral structure (3R Polytype), or a 2-layer hexagonal structure (2H polytype) which was formerly known under the name manasseite. The two polytypes are often intergrown. The carbonate anions that lie between the structural layers are weakly bound, so hydrotalcite has anion exchange capabilities.It was first described in 1842 for an occurrence in a serpentine - magnesite deposit in Snarum, Modum, Buskerud, Norway. It occurs as an alteration mineral in serpentinite in association with serpentine, dolomite and hematite.Hydrotalcite has been studied as potential getter for iodide in order to scavenge the long-lived 129I (T1/2 = 15.7 million years) and also other fission products such as 79Se (T1/2 = 295 000 years) and 99Tc, (T1/2 = 211 000 years) present in spent nuclear fuel to be disposed under oxidising conditions in volcanic tuff at the Yucca Mountain nuclear waste repository. Unfortunately carbonate easily replaces iodide in its interlayer. Another difficulty arising in the quest of an iodide getter for radioactive waste is the long-term stability of the sequestrant that must survive over geological time scales. Layered double hydroxides are well known for their anion exchange properties.Hydrotalcite is also used as an antacid.".
- Q167525 thumbnail Hydrotalcite-200667.jpg?width=300.
- Q167525 wikiPageWikiLink Q103223.
- Q167525 wikiPageWikiLink Q1073138.
- Q167525 wikiPageWikiLink Q1094166.
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- Q167525 wikiPageWikiLink Q1961418.
- Q167525 wikiPageWikiLink Q20.
- Q167525 wikiPageWikiLink Q2142173.
- Q167525 wikiPageWikiLink Q2515411.
- Q167525 wikiPageWikiLink Q274083.
- Q167525 wikiPageWikiLink Q2984382.
- Q167525 wikiPageWikiLink Q335249.
- Q167525 wikiPageWikiLink Q3443295.
- Q167525 wikiPageWikiLink Q3559141.
- Q167525 wikiPageWikiLink Q389137.
- Q167525 wikiPageWikiLink Q407548.
- Q167525 wikiPageWikiLink Q419250.
- Q167525 wikiPageWikiLink Q425450.
- Q167525 wikiPageWikiLink Q43521.
- Q167525 wikiPageWikiLink Q484001.
- Q167525 wikiPageWikiLink Q50618.
- Q167525 wikiPageWikiLink Q588274.
- Q167525 wikiPageWikiLink Q6142193.
- Q167525 wikiPageWikiLink Q7215190.
- Q167525 wikiPageWikiLink Q7318041.
- Q167525 wikiPageWikiLink Q737339.
- Q167525 wikiPageWikiLink Q81454.
- Q167525 wikiPageWikiLink Q83147.
- Q167525 wikiPageWikiLink Q899033.
- Q167525 wikiPageWikiLink Q903232.
- Q167525 wikiPageWikiLink Q905648.
- Q167525 wikiPageWikiLink Q907364.
- Q167525 wikiPageWikiLink Q935396.
- Q167525 name "Hydrotalcite".
- Q167525 type ChemicalSubstance.
- Q167525 type Mineral.
- Q167525 type ChemicalObject.
- Q167525 type Thing.
- Q167525 type Q7946.
- Q167525 comment "Hydrotalcite is a layered double hydroxide of general formula Mg6Al2CO3(OH)16·4(H2O), whose name is derived from its resemblance with talc and its high water content. The layers of the structure may stack in different ways, to produce a 3-layer rhombohedral structure (3R Polytype), or a 2-layer hexagonal structure (2H polytype) which was formerly known under the name manasseite. The two polytypes are often intergrown.".
- Q167525 label "Hydrotalcite".
- Q167525 depiction Hydrotalcite-200667.jpg.
- Q167525 name "Hydrotalcite".