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spessartite |
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spessartite [′spesĀ·ər‚tīt] (mineralogy) Mn3Al2(SiO4)3A mineral composed of manganese aluminum silicate with small amounts of iron, magnesium, or other elements. (petrology) A lamprophyre composed of a sodic plagioclase groundmass in which green hornblende phenocrysts are embedded; also contains accessory olivine, biotite, apatite, and opaque oxides. 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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