Ferrierite: Properties and Occurrence
The ferrierite group of zeolite minerals (the FER structure) consists of three very similar species: ferrierite-Mg, ferrierite-Na, and ferrierite-K, based on the dominant cation in…
Geographic Minerals
Feroxyhyte
Feroxyhyte is an oxide/hydroxide of iron, δ-Fe3+ O(OH). It is a hexagonal oxide/hydroxide of iron that occurs in manganese-iron nodules on the Pacific Ocean floor,…
Fergusonite: Properties and Occurrences
Fergusonite is a mineral comprising a complex oxide of various rare-earth elements. It is a dark mineral consisting of oxides of yttrium and erbium and…
Ferberite: Properties and Occurrences
Ferberite is the iron endmember of the manganese – iron wolframite solid solution series. The manganese endmember is hübnerite. It is a mineral consisting of…
Felsőbányaite
Felsőbányaite or basaluminite is a hydrated aluminum sulfate mineral with formula: Al4(SO4)(OH)10·4H2O. It is a rare white to pale yellow mineral which typically occurs as…
Feldspathoids – Physical and Chemical Properties
The feldspathoids are a group of tectosilicate minerals which resemble feldspars but have a different structure and much lower silica content. The feldspathoid group minerals…
Feldspars
Feldspars (LiAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8) are a group of rock-forming tectosilicate minerals that make up about 41% of the Earth’s continental crust by weight.…
Fayalite: Properties and Occurrence
Fayalite (Fe2SiO4), also called iron chrysolite, is the iron-rich end-member of the olivine solid-solution series. It is a black or brown mineral which is an…
Faustite: Properties and Occurrences
Faustite is a massive, bright green, zinc-rich member of the Turquoise group that is mined near Neynschabour, Iran. It is a triclinic-pinacoidal apple-green mineral containing…
Faujasite: Properties and Occurrences
Faujasite is a mineral group in the zeolite family of silicate minerals. It is a zeolite mineral consisting of sodalite cages connected through hexagonal prisms.…
Farneseite
Farneseite is a mineral from the cancrinite sodalite group with 14 layer stacking. It is a complex silicate mineral with formula: (Na, Ca, K)56(Al6Si6O24)7(SO4)12·6H2O. It…
Fabianite: Properties and Occurrences
Fabianite is a borate mineral with the chemical formula CaB3O5(OH). It is a monoclinic-prismatic colorless mineral containing boron, calcium, hydrogen, and oxygen. It was named…
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