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About: Hibonite     Goto   Sponge   NotDistinct   Permalink

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

Type: Thingdul:ChemicalObjectchemical substanceMineralmineralyago:WikicatCalciumMineralsyago:WikicatLanthanideMineralsyago:WikicatMagnesiumMineralsyago:WikicatMeteoriteMineralsyago:WikicatMineralsyago:WikicatTitaniumMineralsyago:WikicatOxideMineralsyago:Abstraction100002137yago:Material114580897yago:Matter100020827yago:Mineral114662574yago:Part113809207yago:PhysicalEntity100001930yago:Relation100031921yago:WikicatHexagonalMineralsyago:WikicatIronMineralsyago:Substance100019613yago:WikicatAluminiumMineralsyago:WikicatRadioactiveMinerals New Facet based on Instances of this Class

Hibonite is a mineral with the chemical formula (Ca,Ce)(Al,Ti,Mg)12O19, occurring in various colours, with a hardness of 7.5–8.0 and a hexagonal crystal structure. It is rare, but is found in high-grade metamorphic rocks on Madagascar. Some presolar grains in primitive meteorites consist of hibonite. Hibonite also is a common mineral in the Ca-Al-rich inclusions found in some chondritic meteorites. Hibonite is closely related to hibonite-Fe (IMA 2009-027, (Fe,Mg)Al12O19)) an alteration mineral from the Allende meteorite. Hibonites were among the first minerals to form as the disk of gas and dust swirling around the young sun cooled.