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enstatite

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enstatite
enstatite Min. (ˈɛnstətaɪt) [f. Gr. ἐνστάτ-ης adversary (from its refractory nature) + -ite.] A variety of diallage, tinted variously from greyish- or greenish-white to olive-green and brown.1857 C. U. Shepard Min. 425 Enstatite..in prisms, resembling pyroxene or scapolite. 1879 Rutley Stud. Rocks x... Oxford English Dictionary
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Enstatite
Enstatite is a mineral; the magnesium endmember of the pyroxene silicate mineral series enstatite (MgSiO3) – ferrosilite (FeSiO3). An emerald-green variety of enstatite is called chrome-enstatite and is cut as a gemstone. wikipedia.org
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Enstatite chondrite
Enstatite chondrites (E-type chondrites) are a rare form of meteorite, rich in the mineral enstatite. All enstatite chondrites are dominantly composed of enstatite-rich chondrules plus abundant grains of metal and sulfide minerals. wikipedia.org
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Aubrite
They are primarily composed of the orthopyroxene enstatite and are often called enstatite achondrites. Their igneous origin separates them from primitive enstatite achondrites and means they originated in an asteroid. wikipedia.org
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Oldhamite
It occurs as an interstitial mineral phase between silicate minerals in enstatite chondrite and achondrite meteorites. It occurs in association with enstatite, augite, niningerite, osbornite, troilite, gypsum and calcite. wikipedia.org
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Bronzite
Enstatite is magnesium silicate, , with the magnesium partly replaced by small amounts (up to about 12%) of Fe+2. The enstatite endmember has a positive optic sign, whereas bronzite and hypersthene both show a negative optic sign. wikipedia.org
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Niningerite
Niningerite is a magnesium-iron-manganese sulfide mineral with the chemical formula MgS that is found in enstatite chondrite meteorites. wikipedia.org
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هايبرستين
إنه يشكل سلسلة من المحاليل الصلبة مع المعادن enstatite وferrosilite ، كونه عضوًا في منتصف الطريق بين الاثنين. مراجع Mineral galleries Webmineral Mindat locations Enstatite-Hypersthene-Ferrosillite series إينوسيليكات معادن الحديد معادن المغنيسيوم معادن معينة wikipedia.org
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Hypersthene
Many references have formally abandoned this term, preferring to categorise this mineral as enstatite or ferrosilite. It forms a solid solution series with the minerals enstatite and ferrosilite, being a mid-way member between the two. wikipedia.org
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Adhi Kot (meteorite)
Classification It was classified as an enstatite chondrite type EH4. wikipedia.org
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Abee (meteorite)
Abee is an enstatite chondrite meteorite that fell on 9 June 1952 in Alberta, Canada. History The Abee meteorite fell at 11:05 p.m. on 9 June 1952. Classification Abee is classified as an enstatite chondrite with a petrologic type 4, thus belonging to the group EH4. wikipedia.org
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Incongruent melting
Another mineral that can melt incongruently is enstatite (Mg2Si2O6), which produces forsterite (Mg2SiO4) in addition to a melt richer in SiO2 when melting Enstatite melts congruently at higher pressures between 2.5 and 5.5 kilobars. wikipedia.org
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Keilite
Occurrences Examples of keilite occurrences are enstatite chondrites and the Zakłodzie meteorite. It appears to be confined to impact-melt influenced enstatite chondrites that were quenched. wikipedia.org
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Zaklodzie meteorite
It is composed predominantly from enstatite and meteoric iron. The magma originated from the partial melt of an enstatite chondrite source. wikipedia.org
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Yamato 691
Composition and classification This meteorite is a stony enstatite chondrite. Minerals reported from the meteorite include: Troilite Spinel Augite Diopside Enstatite Pigeonite Albite Nepheline Iron Olivine Wassonite – wikipedia.org
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