spessartite

spes·sar·tite

S0630700 (spĕs′ər-tīt′) also spes·sar·tine (-tēn′)n. A red to brownish-red mineral of the garnet group, Mn₃Al₂(SiO₄)₃.

[French, after Spessart, a hilly area of west-central Germany.]

spessartite

(ˈspɛsəˌtaɪt) or

spessartine

n (Minerals) a brownish-red garnet that consists of manganese aluminium silicate and is used as a gemstone. Formula: Mn3Al2(SiO4)3[C19: named after Spessart, mountain range in Germany]

spes•sart•ite

(ˈspɛs ərˌtaɪt)

n. a yellow or red manganese-aluminum garnet, used as a semiprecious gem. [1885–90; after Spessart, a district in Bavaria, where it is found; see -ite¹]

Spessartite

spessartite

[′spes·ər‚tīt] (mineralogy) Mn₃ Al₂(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.

Spessartite

a melanocratic veinstone consisting of medium plagioclase (andesine), hornblende, or monoclinic pyroxene (diopside-augite). Apatite, iron minerals, and, frequently, zircon are present as secondary minerals.

Spessartite is a fine-grained and uniform rock, although individual large crystals (porphyritic impregnations), indicating crystallization in several stages, are sometimes encountered. Spessartite belongs to the lamprophyre group. It is formed in the final stages of crystallization of intrusive granitic mountain masses of low depth and, apparently, is the product of crystallization of a relatively low-temperature, water-rich magma.

单词	spessartite
释义	spessartite spes·sar·tite S0630700 (spĕs′ər-tīt′) also spes·sar·tine (-tēn′)n. A red to brownish-red mineral of the garnet group, Mn₃Al₂(SiO₄)₃. [French, after Spessart, a hilly area of west-central Germany.] spessartite (ˈspɛsəˌtaɪt) or spessartine n (Minerals) a brownish-red garnet that consists of manganese aluminium silicate and is used as a gemstone. Formula: Mn3Al2(SiO4)3[C19: named after Spessart, mountain range in Germany] spes•sart•ite (ˈspɛs ərˌtaɪt) n. a yellow or red manganese-aluminum garnet, used as a semiprecious gem. [1885–90; after Spessart, a district in Bavaria, where it is found; see -ite¹] Spessartite spessartite [′spes·ər‚tīt] (mineralogy) Mn₃ Al₂(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. Spessartite a melanocratic veinstone consisting of medium plagioclase (andesine), hornblende, or monoclinic pyroxene (diopside-augite). Apatite, iron minerals, and, frequently, zircon are present as secondary minerals. Spessartite is a fine-grained and uniform rock, although individual large crystals (porphyritic impregnations), indicating crystallization in several stages, are sometimes encountered. Spessartite belongs to the lamprophyre group. It is formed in the final stages of crystallization of intrusive granitic mountain masses of low depth and, apparently, is the product of crystallization of a relatively low-temperature, water-rich magma.
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