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…
Chemistry
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…
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…
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…
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…
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…
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…
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,…
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…
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…
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…
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…
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