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| caption = Ulvöspinel from Apollo 12 landing site, Oceanus Procellarum (Ocean of Storms)
| formula = TiFe<sup>2+</sup><sub>2</sub>O<sub>4</sub>
|IMAsymbol=Uspl| strunz = 4.BB.05
| color = Iron-black, brown in reflected light
| habit = Commonly as an exsolution in magnetite
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| cleavage =
| fracture =
| mohs = 5.5
| luster = Metallic
| refractive =
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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>
}}
'''Ulvöspinel''' or '''ulvite''' is an iron titanium oxide mineral with formula: [[iron|Fe]]<sub>2</sub>[[titanium|Ti]][[oxygen|O]]<sub>4</sub>or
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.
Ulvöspinel was first described by Fredrik Mogensen (
}}</ref> from a [[dolerite]] layered intrusion in the Ulvö Islands, [[Ångermanland]], [[Sweden]] in 1943. The locality is an iron, titanium and vanadium mining area that has been active since the 17th century.<ref>{{cite journal | doi = 10.1080/11035894609446484| title = A ferro-ortho-titanate ore from Södra Ulvön| journal = Geologiska Föreningen i Stockholm Förhandlingar| volume = 68| issue = 4| pages = 578–587| year = 1946| last1 = Mogensen| first1 = Fredrik}}</ref> It is common in titaniferous magnetite iron ore deposits. It also occurs in [[kimberlite]]s, in some reduced iron-bearing [[basalt]]s and is common in [[moon|lunar]] basalts.
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[[Category:Cubic minerals]]
[[Category:Minerals in space group 227]]
[[Category:Minerals described in 1943]]
{{oxide-mineral-stub}}
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