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- Spinel_group abstract "The spinels are any of a class of minerals of general formulation A2+B3+2O2-4 which crystallise in the cubic (isometric) crystal system, with the oxide anions arranged in a cubic close-packed lattice and the cations A and B occupying some or all of the octahedral and tetrahedral sites in the lattice. A and B can be divalent, trivalent, or quadrivalent cations, including magnesium, zinc, iron, manganese, aluminium, chromium, titanium, and silicon. Although the anion is normally oxide, the analogous thiospinel structure includes the rest of the chalcogenides. A and B can also be the same metal under different charges, as is the case with magnetite, Fe3O4 (as Fe2+Fe3+2O2-4), which is the most abundant member of the Spinel group. Spinels are grouped in series by the B cation.Members of the spinel group include:Aluminium spinels:Spinel: MgAl2O4, after which this class of minerals is namedChrysoberyl: BeAl2O4Gahnite: ZnAl2O4Hercynite: FeAl2O4Galaxite: MnAl2O4Pleonaste: (Mg,Fe)Al2O4Iron spinels:Cuprospinel: CuFe2O4Franklinite: (Fe,Mn,Zn)(Fe,Mn)2O4Jacobsite: MnFe2O4Magnesioferrite: MgFe2O4Magnetite: Fe3O4Trevorite: NiFe2O4Ulvöspinel: TiFe2O4Zinc ferrite: (Zn, Fe) Fe2O4Chromium spinels:Chromite: FeCr2O4Magnesiochromite: MgCr2O4Zincochromite: ZnCr2O4Others with the spinel structure:Coulsonite: FeV2O4Magnesiocoulsonite: MgV2O4Ringwoodite: (Mg,Fe)2SiO4, an abundant olivine polymorph within the Earth's mantle from about 520 to 660 km depth, and a rare mineral in meteoritesThere are many more compounds with a spinel structure, e.g. the thiospinels and selenospinels, that can be synthesized in the lab or in some cases occur as minerals.The heterogeneity of spinel group members varies based on composition with ferrous and magnesium based members varying greatly as in solid solution, which requires similarly sized cations. However, ferric and aluminium based spinels are almost entirely homogeneous due to their large size difference.".
- Spinel_group thumbnail Spinel.GIF?width=300.
- Spinel_group wikiPageID "36819989".
- Spinel_group wikiPageRevisionID "604674895".
- Spinel_group hasPhotoCollection Spinel_group.
- Spinel_group subject Category:Spinel_group.
- Spinel_group comment "The spinels are any of a class of minerals of general formulation A2+B3+2O2-4 which crystallise in the cubic (isometric) crystal system, with the oxide anions arranged in a cubic close-packed lattice and the cations A and B occupying some or all of the octahedral and tetrahedral sites in the lattice. A and B can be divalent, trivalent, or quadrivalent cations, including magnesium, zinc, iron, manganese, aluminium, chromium, titanium, and silicon.".
- Spinel_group label "Groupe du spinelle".
- Spinel_group label "Gruppo degli spinelli".
- Spinel_group label "Spinel group".
- Spinel_group label "Spinele".
- Spinel_group label "Spinelle".
- Spinel_group sameAs Spinelid.
- Spinel_group sameAs Spinelle.
- Spinel_group sameAs Groupe_du_spinelle.
- Spinel_group sameAs Gruppo_degli_spinelli.
- Spinel_group sameAs Spinele.
- Spinel_group sameAs m.0qfnn5j.
- Spinel_group sameAs Q1290820.
- Spinel_group sameAs Q1290820.
- Spinel_group wasDerivedFrom Spinel_group?oldid=604674895.
- Spinel_group depiction Spinel.GIF.
- Spinel_group isPrimaryTopicOf Spinel_group.
