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| references = <ref>http://www.mindat.org/show.php?id=4089 Mindat</ref><ref>http://rruff.geo.arizona.edu/doclib/hom/ulvospinel.pdf Handbook of Mineralogy</ref><ref>http://webmineral.com/data/Ulvospinel.shtml Webmineral data</ref><ref>https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Ulv%F6spinel Mineralienatlas</ref> |
| references = <ref>http://www.mindat.org/show.php?id=4089 Mindat</ref><ref>http://rruff.geo.arizona.edu/doclib/hom/ulvospinel.pdf Handbook of Mineralogy</ref><ref>http://webmineral.com/data/Ulvospinel.shtml Webmineral data</ref><ref>https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Ulv%F6spinel Mineralienatlas</ref> |
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'''Ulvöspinel''' or '''ulvite''' is an iron titanium oxide mineral with formula: [[iron|Fe]]<sub>2</sub>[[titanium|Ti]][[oxygen|O]]<sub>4</sub> or TiFe<sup>2+</sup><sub>2</sub>O<sub>4</sub>. It forms brown to black metallic [[Cubic (crystal system)|isometric]] crystals with a [[Mohs hardness]] of 5.5 to 6. It belongs to the [[spinel group]] of minerals, as does [[magnetite]], Fe<sub>3</sub>O<sub>4</sub>. |
'''Ulvöspinel''' or '''ulvite''' is an iron titanium oxide mineral with formula: [[iron|Fe]]<sub>2</sub>[[titanium|Ti]][[oxygen|O]]<sub>4</sub>or TiFe<sup>2+</sup><sub>2</sub>O<sub>4</sub>. It forms brown to black metallic [[Cubic (crystal system)|isometric]] crystals with a [[Mohs hardness]] of 5.5 to 6. It belongs to the [[spinel group]] of minerals, as does [[magnetite]], Fe<sub>3</sub>O<sub>4</sub>. |
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Ulvöspinel forms as [[solid solution]]s with magnetite at high temperatures and reducing conditions, and grains crystallized from some [[basalt]]-[[gabbro]] magmas are rich in the ulvöspinel component. The ulvöspinel component tends to oxidize to magnetite plus [[ilmenite]] during subsolidus cooling of the host rocks, and the ilmenite so produced may form apparent [[exsolution]] (trellis type) laminae in [[magnetite]]. The texture was once interpreted as indicating solid solution between ilmenite and magnetite, until the oxidation reaction and resultant textures were reproduced in laboratory experiments first described by Buddington and Lindsley (1964, |
Ulvöspinel forms as [[solid solution]]s with magnetite at high temperatures and reducing conditions, and grains crystallized from some [[basalt]]-[[gabbro]] magmas are rich in the ulvöspinel component. The ulvöspinel component tends to oxidize to magnetite plus [[ilmenite]] during subsolidus cooling of the host rocks, and the ilmenite so produced may form apparent [[exsolution]] (trellis type) laminae in [[magnetite]]. The texture was once interpreted as indicating solid solution between ilmenite and magnetite, until the oxidation reaction and resultant textures were reproduced in laboratory experiments first described by Buddington and Lindsley (1964, Journal of Petrology 5, p. 310–357). The results are important to [[plate tectonics]] because magnetite is an important recorder of rock magnetism. |
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Ulvöspinel was first described by Fredrik Mogensen (1904–1978) <ref>{{cite web | url = https://sok.riksarkivet.se/sbl/Presentation.aspx?id=9402 | title = Fredrik K Mogensen |
Ulvöspinel was first described by Fredrik Mogensen (1904–1978) <ref>{{cite web | url = https://sok.riksarkivet.se/sbl/Presentation.aspx?id=9402 | title = Fredrik K Mogensen |
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