Iron sesquioxide

Gasgnier M (2000) Ultrasound effects on metallic (Fe and Cr) iron sesquioxide (a-, y-Fe203) calcite copper, lead and manganese oxides as powders. Ultrason Sonochem 7 25-39... 

Reasoning by analogy, it would appear not unlikely that native oxides, such as alumina (corundum, ruby, sapphire), or iron sesquioxide (haematite), may be in reality an aluminate of alumina, A1(A102)3, or ferric ferrite, Fe(Fe02)3.. . ... 

SYNONYMS ferric oxide, iron (III) oxide, iron sesquioxide, red iron oxide. 

But the admirable researches of Gay-Lussac and of Mitscherlich have established the fact, that in many instances, different compounds assume the same form. Thus, the following substances, and many others, take the form of the cube, tetrahedron, or regular octohedron, which are geometrically connected. Chloride of sodium (sea-salt), chloride of potassium, sal ammoniac bromide of potassium iodide of potassium sulphuret of lead fluoride of calcium bisnlphuret of iron arseniuret of cobalt sulphate of alumina and potash (alum) ammonia alum chrome alum, iron alum sesqnioxide of iron, sesquioxide of aluminum, sesquioxide of chromium. In like manner, other crystalline forms are found to be common to many different compounds, although none occurs so frequently as the cube and its congeners. 

RED BURNT SIENNA BURNT UMBER CALCOTONERED COLCOTHAR COLLOIDAL FERRIC OXIDE FERRIC OXIDE INDIAN RED IRON(in) OXIDE IRON OXIDE RED IRON SESQUIOXIDE JEWELER S ROUGE MARS BROWN MARS RED NATURAL IRON OXIDES NATURAL RED OXIDE OCHRE PRUSSIAN BROWN RED IRON OXIDE RED OCHRE ROUGE RUBIGO SIENNA SYNTHETIC IRON OXIDE VENETIAN RED VITRIOL RED YELLOW OXIDE OF IRON... 

Sometimes the magnetic method reveals the existence of valence bonds (p. 38) between adjacent positive ions, such as between iron and iron in hydrous (p. 80) or supported (p. 68) iron sesquioxide. 

Iron (III) oxide Iron oxide red Iron sesquioxide Natural iron oxides Natural red oxide... 

Iron sesquioxide. See Ferric oxide Iron (III) sodium pyrophosphate. See Ferric sodium pyrophosphate Iron sponge, spent. See Iron oxide red Iron subcarbonate. See Iron oxide brown Iron sulfate Iron (II) sulfate (1 1). See Ferrous sulfate anhydrous... 

B) Structural horizon that diflers from the original rock by the intensity of the weathering process characterized by a greater amount of free iron sesquioxide and from the A horizon having a different structure. Sometimes denoted B,. 

Note 3.9.- we note that the above reasoning hardly applies at all to iron sesquioxide FeaOs. Indeed, that compound is not stable in the presenee of iron or of one of the other oxides, and does not reach equilibrium. 

In numerous cases, known as reciprocal solutions, the solid solution can be considered to be the product of two pairs of pure compounds, which are called the poles. Thus, the solution between iron sesquioxide (Fc304) and nickel chromate (NiCr204) 5delds spinel (Fe, Ni )i (Cr, Fe )i. However, this solution could also give rise to the following pure compounds iron chromate (FeCr204) and nickel ferrite (NiFe04). We say that the possible poles of spinel are either the iron sesquioxide-nickel chromate pair or the iron chromate-nickel ferrite pair. 

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