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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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