Yellow oxide of iron

Tha orude solution of prussiate of potassa, and even the prussiate purified by a single crystallization, still contain, as has been stated, more or less carbonate of potassa, so that, besides the prussian blue, there is precipitated at the same time yellow oxide of iron, which deteriorates its tint. To obviate tills inconvenience, the carbonate of potassa is neutralized by sulphuric acid, which may he added cither to the solution of prussiate of potassa or to that of the protosnlphate of iron. In the manufacture of the common Berlin blues, the carbonate of potassa is neutralized by alum thoro results a precipitate of alumina, which mixes intimately with the prussian blue, and greatly augjnente... 

TTRIOL RED VOGEL S IRON RED YELLOW FERRIC OXIDE YELLOW OXIDE of IRON... 

YELLOW OXIDE of IRON (1309-37-1) Violent reactions with powdered aluminum (thermite reaction), hydrogen peroxide, calcium disilicide (thermite reaction), ethylene oxide (may cause explosive polymerization), calcium hypochlorite, hydrazine, hydrogen trisulfide, powdered magnesium. Incompatible with powdered calcium carbide, carbon monoxide, chlorides, guanidinium perchlorate, metal acetylides. Contact with the explosive hydrazinium diperchlorate or ammonium perchlorate can be made more heat-, shock-, or friction-sensitive. Incompatible with aluminum-magnesium-zinc alloys. 

Deep Yellow No. 11.—This is made like No. 10, but 20 parts of colcothar or of red oxide are substituted for the carbonate of zinc and the yellow oxide of iron. 

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... 

Earth pigment n. Class of pigments, which are usually mined directly from the earth, dried, generally Calcined and ground. Typical examples are red and yellow oxides of iron, yellow ochre, raw and burnt siermas, and raw and burnt umbers. Syn mineral pigments and natural pigments. 

Goethite is a natural yellow oxide of iron also known as yellow ocher. These pigments are forms of hydrated ferric oxide having... 

Ferruginous Clays, amongst which may be classed reddls, bole, and ochre. The former two derive their red color from the presence of oxide of iron, the latter its yellow tinge from the hydrate of the same oxide. Theea varieties are used as pigments, but not for the same purposes as the other clays. From the large... 

A powder which burns with a green flame is obtained by the addition of nitrate of baryta to chlorate of potash, nitrate of potash, acetate of copper. A white flame is made by the addition of sulfide of antimony, sulfide of arsenic, camphor. Red by the mixture of lampblack, coal, bone ash, mineral oxide of iron, nitrate of strontia, pumice stone, mica, oxide of cobalt. Blue with ivory, bismuth, alum, zinc, copper sulfate purified of its sea water [sic]. Yellow by amber, carbonate of soda, sulfate of soda, cinnabar. It is necessary in order to make the colors come out well to animate the combustion by adding chlorate of potash.15... 

In the Journal de physique for 1779 the apothecary, Bayen, described a fulminating mercurial preparation of another kind. Thirty parts of precipitated, yellow oxide of mercury, washed and dried, was mixed with 4 or 5 parts of sulfur the mixture exploded with violence when struck with a heavy hammer or when heated on an iron plate. Other mixtures which react explosively when initiated by percussion have been studied more recently,2 metallic sodium or potassium in contact with the oxide or the chloride of silver or of mercury or in contact with chloroform or carbon tetrachloride. 

Hydrochloric Add Test.—A small quantity of the substance is boiled with hydrochloric acid and filtered if the filtrate is yellow, it is tested for oxide of iron. 

Some simple oxides are brighdy or strongly colored, and have been used as pigments. This includes the common oxides of iron, hematite, which is red and black, and goethite (syn. limonite), which is yellow or brown. These compounds have also been called ocher, yellow ocher, or brown ocher. Minium and massicot... 

Hot springs may contain lots of different minerals in solution. Upon reaching the surface, these waters cool off and the compounds held in solution will precipitate around vents or pools. The most common deposits around hot springs are composed of calcite or common opal. Both of these minerals are colorless when pure, but are often colored by other materials in the water. Oxides of iron are the most common pigments in these situations. In shades of brown, red, and yellow, iron oxide may color an entire deposit, or appear episodically, dyeing some layers and not others. 

The brown ring is due to the formation of the [Fe(NO)]2+. On shaking and warming the mixture the brown colour disappears, nitric oxide is evolved, and a yellow solution of iron(III) ions remains. The test is unreliable in the presence of bromide, iodide, nitrite, chlorate, and chromate (see Section IV.45, reactions 3 and 4). 

---