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7 Jun 2010:  Metamagnetism. A brief history of magnetism. Lodestone or magnetite Fe3O4 known since 500-800 BC by the Greeks and Chinese.

7 Jun 2010: Thin scale of Cr-rich oxide, presumably Cr2O3, forms on the specimen surface of 9Cr-3WVNb steel with 3%Pd in steam at 650oC, while thick scale consisting of magnetite in ... No evidence is found for the formation of Fe3O4 magnetite type oxide scale nor

4 Aug 2010: According to Suda, rust formed on bars embedded in concreteconsists of magnetite (Fe3O4), geothite (αFeO(OH)), lepidocrocite(γFeO(OH)) and amorphous components (Fe(OH)3 and FeOOH).Knowing the percentage, density

16 Jul 2010: When other dense phases join in (for example, magnetite), or the ferromagnesian phases become very iron-rich, the fractionation density can become larger than the melt density, causing a decrease in

7 Jun 2010: This indeed was detected by the diffraction measurements and identified aspredominantly magnetite (Fe2.9O4) and small amounts of hematite (Fe2O3).

7 Jun 2010: Figure 12. APS Diffraction data from austenite prior to its transformation; starting fromthe bottom, the rings correspond to 111γ, 002γ , 224M , 151M , 404M and 220γ , where thesubscript M , refers to magnetite

7 Jun 2010: Further, due to the growth of magnetite on the internal tube surface, mid wall temperatures could increase to about 600 C, if low alloy steels were used. ... VILHELMSEN, Lifetime Evaluation of Evaporator Tubes Exposed to Steam Oxidation, Magnetite

7 Jun 2010: In boilers operating at 625C/32 MPa, maximum midwall temperatures can be as high as 500-525C, depending on magnetite deposits at the inside of the tube.