单词 | spessartite |
释义 | spessartite [`spes·ǝr´tīt] MINERALOGY Mn3Al2(SiO4)3 A 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. |
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