Rubies, color

Selenium is used in Xerography for reproducing and copying documents, letters, etc. It is used by the glass industry to decolorize glass and to make ruby-colored glasses and enamels. It is also used as a photographic toner, and as an additive to stainless steel. 

Rubin, m. ruby, -balas, m. balas ruby (ruby spinel), -blende, /. pyrargyrite. -farbe, /. ruby color, ruby. 

It will be seen from the preceding tebles that the proportion of resin is much larger in shell-lac than in any of the other commercial forms of the resins. The better quality of the article is of a light-brown hue passing into orange, and sometimes to a deep ruby color, whence the names orange and ruby shcll-lnc the inferior kinds are much less transparent, darker in color like glue, and in thicker plates. 

Acylation of 1-amino- or 1,5-diaminoanthraquinones yields yellow vat dyes and affords red to ruby colored dyes when 1,4-diaminoanthraquinones are used. Use of 4,8-diamino-l,5-dihydroxy-anthraquinones gives violet to blue dyes. The relatively low lightfastness of the yellow acylaminoanthraquinones may be improved greatly by using azodiphenyl-4,4 -dicarboxv 1 ic acid. Acylaminoanthraquinones are relatively sensitive to atmospheric conditions. 

Di-methyl aniline, CeHs—N(CH3)2, is a liquid boiling at the same point as the mono-methyl compound with which it is obtained by the ordinary method of preparation and from which it may be separated by the method just described. It forms well crystallized salts, especially the double salt with platinum chloride, viz., CeHs—N(CH3)2.HCL-PtCh. This compound crystalhzes, with two molecules of water, in ruby colored prisms, which, on loss of water, become reddish-yellow plates. The acid oxalate salt, CeHs—N(CH3)2.(COOH)2, forms large rectangular plates melting at 139°. With nitrous acid the reaction is the one characteristic of aromatic tertiary amines. 

Perfluoronapthalene appears to form a charge transfer complex with cobaltocene but no further C-F activation is detected [74]. The crystal structure of a ruby-colored ferrocene-perfluorophenanthrene molecular complex has recently been reported [75]. The presence of only one tertiary C-F bond is required for reactivity in this system as illustrated by the synthesis of perfluorotoluene from perfluoromethylcyclohexane under similar conditions. 

In this investigation, we have used reaction vessels of about a liter in volume containing an equimolar mixture anhydrous methane and ammonia up to a pressure of 0.5 atm. The electrodes consisted of gold wires about 1 cm. apart. A typical reaction lasted for about 15 hours. The current passing through the system was about 0.5 ma. The end products consisted of (1) gases, (2) colorless distillate, and (3) a ruby colored residue. 

Isovalent doping e.g., Al203 Cr in (Al3 Cr )03 Ruby color depends critically on x local structure of Cr within Al O, crystal lattice... 

High chrome, ruby colored. Surface grinding and internal wheels. 

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