Ferric sesquioxide

Synonyms ferric oxide, hematite, red iron oxide, ferric sesquioxide... 

Ferric Oxide. Ferric sesquioxide jeweler s rouge. Fe203 mol wt 159.70. Fe 69.94%, O 30.06%. a-Form occurs in nature as the mineral hematite, v-Form occurs in nature as the mineral maghemite prepd by dehydration of a -FeO(OH) Giovanoli, Briitsch, Chimia 28, 188 (1974). 

According to T. Curtius, feme chloride is reduced by hydrazine to ferrous chloride a reaction investigated by E. Miiller and G. Wegdin, and F. Schrader. E. J. Cuy found that in the reaction between hydrazine and a ferric salt in acid soln., one mol of hydrazine requires between one and two eq. of ferric salt for oxidation. The limiting reaction may be expressed as follows N2H 5-)-Fe" =NH 4+JN2+H +Fe". A. W. Browne and F. F. Shetterly showed that ferric oxide and hydrazine in aq. soln, yield ammonia, but no hydrazoic acid, while nickel sesquioxide and cobalt sesquioxide yield ammonia and traces of hydrazoic acid. H. Franzen and 0. von Mayer made complex cobalt salts—e.g. CoC12(N2H4)2, etc.—with hydrazine in place of ammonia. T. Curtius found that platinum is precipitated when a soln. of hydrazine is added to a neutral soln. of platinum... 

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.. . ... 

The sesquioxide, Cr Oa, containing trivalent chromium, is an amphoteric oxide. It yields chromic salts, such as chromic chloride, CrCla, and sulphate, Cr2(S04)a, which are very stable and show great similarity to the ferric salts and to salts of aluminium as, for example, in the formation of alums. Since, however, chromic oxide functions as a weaker base than chromous oxide, the latter having a lower oxygen content, the chromic salts are more liable to hydrolysis than the chromous salts. This is well marked in the case of the chlorides. Again, in spite of the stability of chromic salts, only a slight tendency to form simple Cr " ions is exhibited, whilst complex ions are formed much more readily, not only complex anions, as in the case of iron and aluminium, but also complex cations, as in the extensive chromammine series. In this respect chromium resembles cobalt and platinum. 

Ferric citrate 4160 Fe2(C6Hj07)2 Citrate of iron citrate of sesquioxide of Iron prussiate of Iron. 

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

Ferric Oxid—Sesquioxid or peroxid of iron—Colcothar—Jeweller s rouge—Venetian red—FejOa—159.8—occurs in nature (see above and is formed when ferrous sulfate is strongly heated, as in the manufacture of pyrosulfuric acid. It is a reddish, Amorphous solid, is a weak base, and is decomposed at a white heat into O and Pes04. 

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... 

Hydrated chromic sesquioxide Hydrated chromium oxide green Hydrated chromium sesquioxide. See Chromium hydroxide green Hydrated ferric oxide. See Cl 77492 Iron (III) oxide hydrated Iron oxide yellow monohydrate Hydrated Lime MR-200 Hydrated lime. See Calcium hydroxide... 

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... 

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