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Pseudobrookite [abbr. Psb ]

Year of discovery: 1878 (Uroi Hill (Arany Hill), Romania), 1976 (Japan)

Locality list: 6 localities of pseudobrookite

• Fe₂TiO₅
• (Fe³⁺,Fe²⁺)₂(Ti,Fe)O₅
• [Fe³⁺₂][Ti⁴⁺][O₅]^10-

• Class: Oxide

• Fe₂ = MgTi: Armalcolite (Series)

• Color: Brownish black, Reddish brown
• Streak: Brown
• Luster: Adamantine
• Diaphaneity: Opaque

• Cleavage: Distinct on {010} (1 plane)
• Hardness: 6
• Density: 4.4

• System: Orthorhombic
• Group: mmm, Bbmm
• Lattice: a=9.8, b=10.0, c=3.7

Etymology: Resemble appearance to brookite.