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Iron(III) nitrate is deliquescent, and it is commonly found as the nonahydrate Fe(NO 3) 3 ·9H 2 O, which forms colourless to pale violet crystals. This compound is the trinitrate salt of the aquo complex [Fe(H 2 O) 6] 3+. [4] Other hydrates Fe(NO 3) 3 ·x H 2 O, include:
Iron(II) nitrate can be produced in multiple ways, such as the reaction of iron metal with cold dilute nitric acid: . 3 Fe + 8 HNO 3 + 12 H 2 O → 3 Fe(NO 3) 2 (H 2 O) 6 + 2 NO. If this reaction is conducted below -10 °C, nonahydrate is produced.
Fe 2 (CrO 4) 3 Molar mass: 459.6808 g/mol Appearance yellow powder Solubility in water. reacts, see also solubility chart: ... 2 Fe(NO 3) 3 + 3 K 2 CrO 4 → Fe 2 ...
Fe 2 O 3 + 3 CO → 2 Fe + 3 CO 2. Another redox reaction is the extremely exothermic thermite reaction with aluminium. [17] 2 Al + Fe 2 O 3 → 2 Fe + Al 2 O 3. This process is used to weld thick metals such as rails of train tracks by using a ceramic container to funnel the molten iron in between two sections of rail.
A related series with ratio 1.5 of the monovalent ion to cerium includes 2Ce(NO 3) 3.3(NH 4)NO 3.12H 2 O [20] A mixed caesium, sodium cerium triple nitrate Cs 2 NaCe(NO 3) 6 crystallizes in the cubic system. The unit cell size is 1.1196 nm with volume of 1.4034 nm 3 and four molecules per cell. [30]
Greigite, with the chemical formula Fe 2+ Fe 3+ 2 S 4, is a mixed valence compound containing both Fe(III) and Fe(II). It is the sulfur equivalent of the iron oxide magnetite (Fe 3 O 4). As established by X-ray crystallography, the S anions form a cubic close-packed lattice, and the Fe cations occupy both tetrahedral and octahedral sites. [5]
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Iron(II,III) oxide, or black iron oxide, is the chemical compound with formula Fe 3 O 4.It occurs in nature as the mineral magnetite.It is one of a number of iron oxides, the others being iron(II) oxide (FeO), which is rare, and iron(III) oxide (Fe 2 O 3) which also occurs naturally as the mineral hematite.