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Minerals in the olivine group crystallize in the orthorhombic system (space group Pbnm) with isolated silicate tetrahedra, meaning that olivine is a nesosilicate. The structure can be described as a hexagonal, close-packed array of oxygen ions with half of the octahedral sites occupied with magnesium or iron ions and one-eighth of the ...
Some examples: rocksalt (a redirect), halite and sodium chloride; kaolin earth (a redirect) and kaolinite; apatite, strict sense (chlorapatite, fluorapatite and hydroxylapatite), apatite group and apatite supergroup; kaolinite-serpentine group (alias serpentine), serpentine subgroup, serpentinization and serpentinite; olivine structural group ...
Fayalite (olivine group) Feldspar (mineral group) Feldspathoid (mineral group) Felsőbányaite; Fengchengite (eudialyte group) Ferberite; Fergusonite (mineral group) Feroxyhyte; Ferrierite (subgroup of zeolite minerals) Ferrihydrite; Ferrimolybdite; Ferro-actinolite; Ferrogedrite; Ferrohortonolite (olivine group) Ferronigerite-2N1S ...
Monticellite and kirschsteinite (commonly also spelled kirschteinite [3]) are gray silicate minerals of the olivine group with compositions Ca Mg Si O 4 and CaFeSiO 4, respectively.. Most monticellites have the pure magnesium end-member composition but rare ferroan monticellites and magnesio-kirschsteinite are found with between 30 and 75 mol.% of the iron end memb
Fayalite (Fe 2 SiO 4, commonly abbreviated to Fa) is the iron-rich end-member of the olivine solid-solution series. In common with all minerals in the olivine group, fayalite crystallizes in the orthorhombic system (space group Pbnm) with cell parameters a 4.82 Å, b 10.48 Å and c 6.09 Å.
The mineral assemblage is greater than 90% olivine, with minor amounts of other minerals such as pyroxene, chromite, magnetite, and pyrope. Dunite is the olivine-rich endmember of the peridotite group of mantle-derived rocks.
Serpentinization is a hydration and metamorphic transformation of ferromagnesian minerals, such as olivine and pyroxene, in mafic and ultramafic rock to produce serpentinite. [1] Minerals formed by serpentinization include the serpentine group minerals (antigorite, lizardite, chrysotile), brucite, talc, Ni-Fe alloys, and magnetite.
Tephroite is the manganese endmember of the olivine group of nesosilicate minerals with the formula Mn 2 Si O 4. A solid solution series exists between tephroite and its analogues, the group endmembers fayalite and forsterite. Divalent iron or magnesium may readily replace manganese in the olivine crystal structure.