Ulvöspinel
| Ulvöspinel | ||
|---|---|---|
Specific gravity 4.78 | | |
| References | [1][2][3][4] | |
Ulvöspinel or ulvite is an iron titanium oxide mineral with formula:
Mohs hardness of 5.5 to 6. It belongs to the spinel group of minerals, as does magnetite
, Fe3O4.
Ulvöspinel forms as
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.
Ulvöspinel was first described by Fredrik Mogensen (1904–1978) 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.[6] It is common in titaniferous magnetite iron ore deposits. It also occurs in kimberlites, in some reduced iron-bearing basalts and is common in lunar basalts.
References
- ^ http://www.mindat.org/show.php?id=4089 Mindat
- ^ http://rruff.geo.arizona.edu/doclib/hom/ulvospinel.pdf Handbook of Mineralogy
- ^ http://webmineral.com/data/Ulvospinel.shtml Webmineral data
- ^ https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Ulv%F6spinel Mineralienatlas
- ^ "Fredrik K Mogensen".
- .