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About: Jennite     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Substance100019613, within Data Space : dbpedia.org associated with source document(s)

Type: Thingdul:ChemicalObjectchemical substanceMineralmineralyago:WikicatCalciumMineralsyago:WikicatMineralsyago:WikicatTriclinicMineralsyago:WikicatSilicateMineralsyago:WikicatSilicatesyago:Abstraction100002137yago:Chemical114806838yago:Compound114818238yago:Hydrate114910440yago:Material114580897yago:Matter100020827yago:Mineral114662574yago:Part113809207yago:PhysicalEntity100001930yago:Relation100031921yago:WikicatHydratesyago:Salt115010703yago:Silicate115040033yago:Substance100019613 New Facet based on Instances of this Class

Jennite is a calcium silicate hydrate mineral of general chemical formula: Ca9Si6O18(OH)6·8H2O. Jennite occurs as an alteration mineral in metamorphosed limestone and skarn. It typically occurs as vein and open space fillings as a late mineral phase. It also occurs in hydrated cement paste. In contrast to the first analysis made by Carpenter, jennite does not contain appreciable amount of sodium when the Crestmore specimen was reexamined (Gard, 1977). Jennite transforms to metajennite at 70–90 °C (158–194 °F) by losing four water molecules (Gard, 1977).