Yellow ocher

Gelbe, n. yellow (of an egg), yolk. Gelbeisen-erz, n., -stein, m. yellow day ironstone (okriges) yellow ocher copiapite. -kies, m. pyrite. gelbeln, v.i. turn yellowish. 

Goethite is the colored component of yellow ocher a weathering product mainly of siderite, sulfidic ores, and feldspar. It occurs in workable amounts mainly in the Republic of South Africa and France. The Fe2Oa content gives an indication of the iron oxide hydroxide content of the ocher, and is ca. 20% in the French deposits and ca. 55% in the South African. 

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... 

Antimony lead oxide (SbzPbsOs) Diantimony trilead octaoxide EINECS 236-845-9 Lead antimonate Lead antimonate(V) Naples yellow Paris yellow. An orange-yellow pigment, A mixture of this material with carbonate and chromate of lead is also sold under this name. Cadmium sulfide, CPS, and a pale yellow ocher have been identified by this term used to stain glass, crockery and porcelain. Insoluble in H2O. 

Synthetic yellow ocher n. Synthetic yellow iron oxide reduced with aluminum silicate and other extender pigments. 

Yellow iron oxide n. Fe203-xH20. Pigment yellow (77492). A natural or synthetic iron oxide. It has excellent bleed resistance, chemical resistance (both acid and alkali), lightfastness, and dispersibility, as well as excellent toxicity ratings. However, these yellow oxides have only fair heat resistance since they are subject to color change bout 177°C due to loss of water of hydration. Syn ferrite yellow, ocher, monohydrate of ferric oxide, and limonite. 

Yellow ocher (15c) (1) n. A mixture of limonite usually with clay and silica used as a pigment. (2) A moderate orange yellow. 

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

---