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hercynite |
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hercynite [′hərsĀ·ən‚īt] (mineralogy) (Fe,Mg)Al2O4A black mineral of the spinel group; crystallizes in the isometric system. Also known as ferrospinel; iron spinel. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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At iron melting temperatures, hercynite doesn't form as readily as it does at steel melting temperatures. For example, aluminum-coated or killed steel used in cast iron melting will result in alumina or alumina complex mineral deposits such as hercynite (iron aluminate), mullite (silica alumina), etc. PHOTO : CL micrograph of a buildup sample showing anorthite (yellow), corundum (red) and hercynite (black) crystals. |
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