Category Oxide mineral Strunz classification 4.CB.15 Space group Bbmm | Formula
(repeating unit) Fe2TiO5 Crystal system Orthorhombic | |
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Crystal class Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m) | ||
Pseudobrookite is an iron titanium oxide mineral with formula: Fe2TiO5 or (Fe3+,Fe2+)2(Ti,Fe2+)O5.
Discovery and occurrence
Pseudobrookite was first described in 1878 for an occurrence in Uroi Hill (Arany Hill), Simeria, Hunedoara County, Romania. The name is from Greek ψευδής, for false, and brookite because of its misleading similar appearance to brookite.
Pseudobrookite forms as pneumatolytic deposition and alteration within titanium-rich volcanic rocks such as andesite, rhyolite or basalt. It may be associated with xenoliths contained in the volcanics. It also commonly occurs in lithophysae.
It occurs associated with hematite, magnetite, bixbyite, ilmenite, enstatite-ferrosilite, tridymite, quartz, sanidine, topaz, spessartine, beryl, mica, cassiterite and apatite.
Occurrences include: