Chemistry

Analcime

Analcime

Analcime is a white, gray, or colorless tectosilicate mineral. It is a member of the zeolite group and often occurs together with other zeolites. It consists of hydrated sodium aluminum silicate in cubic crystalline form. Its chemical formula is NaAlSi2O6·H2O. Minor amounts of potassium and ca.....

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Edenite: Proprieties and Occurrence

Edenite: Proprieties and Occurrence

Edenite is a double chain silicate mineral of the amphibole group with the general chemical composition NaCa2Mg5 (Si7Al)O22(OH)2. It is a member of the extended Hornblende group. There are several variations of Edenite with different elemental substitutions. It is not Radioactive It is named for .....

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Pargasite: Properties and Occurrence

Pargasite: Properties and Occurrence

Pargasite is a complex inosilicate mineral of the amphibole group with formula NaCa2 (Mg4Al) (Si6 Al2) O22 (OH)2. It is a member of the extended Hornblende group. Most Hornblendes, including Pargasite, are dark and opaque, however, Pargasite can also be lightly colored and transparent. It was fir.....

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Richterite: Properties and Occurrence

Richterite: Properties and Occurrence

Richterite is a sodium calcium magnesium silicate mineral belonging to the amphibole group. Richterite, [Formula: Na(NaCa)Mg5Si8O22(OH)2] which is sometimes called soda tremolite, is closely related to tremolite. It basically is the sodium-rich version of tremolite which is calcium rich. If iron .....

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Arfvedsonite

Arfvedsonite

Arfvedsonite is a sodium amphibole mineral with composition: [Na][Na2][(Fe2+)4Fe3+][(OH)2|Si8O22]. It crystallizes in the monoclinic prismatic crystal system and typically occurs as greenish black to bluish grey fibrous to radiating or stellate prisms. It is not Radioactive. Arfvedsonite is not a.....

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Riebeckite: Properties and Occurrence

Riebeckite: Properties and Occurrence

Riebeckite is a sodium-rich member of the amphibole group of silicate minerals, chemical formula Na2(Fe2+3Fe3+2)Si8O22(OH)2. It forms a solid solution series with magnesioriebeckite. It commonly forms prismatic crystals, but it also occurs as a fibrous asbestiform mineral. It is a moderately hard.....

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Glaucophane: Properties and Occurrence

Glaucophane: Properties and Occurrence

Glaucophane is the name of a mineral and a mineral group belonging to the sodic amphibole supergroup of the double chain inosilicates, with the chemical formula- Na2(Mg3Al2)Si8O22(OH)2. It is the magnesium rich member and ferroglaucophane is the iron rich member. Ferroglaucophane is similar to gl.....

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Hornblende: Properties and Occurrence

Hornblende: Properties and Occurrence

Hornblende is a complex inosilicate series of minerals. It is an important constituent in acidic and intermediate igneous rocks such as granite, diorite, syenite, andesite, and rhyolite. It is not a recognized mineral in its own right, but the name is used as a general or field term, to refer to .....

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Grunerite

Grunerite

Grunerite is a mineral of the amphibole group of minerals with formula Fe7Si8O22(OH)2. It is the iron endmember of the grunerite-cummingtonite series. It is not radioactive. It was discovered in 1853 and named after Emmanuel-Louis Gruner (1809–1883), a Swiss-French chemist who first analyzed it.....

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Cummingtonite: Properties and Occurrence

Cummingtonite: Properties and Occurrence

Cummingtonite is a metamorphic amphibole with the chemical composition (Mg, Fe2+)2(Mg, Fe2+)5 Si8O22 (OH)2, magnesium iron silicate hydroxide. It is an amphibole mineral, an iron and magnesium silicate that occurs in metamorphic rocks. It is an important mineral which is also recognized as a m.....

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Tremolite: Properties and Occurrence

Tremolite: Properties and Occurrence

Tremolite is a member of the amphibole group of silicate minerals with composition: Ca2(Mg5)Si8O22(OH)2. It is one of the few amphiboles that has not been redefined or renamed in any of the amphibole nomenclature reports. Tremolite forms by metamorphism of sediments rich in dolomite and quartz. I.....

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Ferrogedrite: Properties and Occurrence

Ferrogedrite: Properties and Occurrence

Ferrogedrite is an amphibole mineral with the complex chemical formula of Fe22+(Fe32+Al2) (Si6 Al2)O22(OH)2. It is sodium and calcium poor, making it part of the magnesium-iron-manganese-lithium amphibole subgroup. Defined as less than 1.00 apfu (atoms per formula unit) of Na + Ca and consisting .....

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