User:Łukasz Hebda/chemistry
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- element
- natural
- synthetic
- iron:
- magnetite (Fe3O4) 72.4% Fe
- hematite (Fe2O3) 69.9% Fe
- goethite (FeCO(OH)) 62.9% Fe
- limonite
- siderite (FeCO3) 48.2% Fe
- copper
- aluminium
- sulfur
- pyrite (FeS2)