Cobalt silicate glass

As mentioned above, the cobalt silicate glass chips offer one practical system for measurements in the kilorad range. However, since the chips need to be embedded in the fruit, they are not convenient, and also they are relatively expensive. Nevertheless, these chips may still be the best choice for definitive work at low doses. 

Silicates Amorphous silicates Glass, cobalt doped... 

Porcelain enamels on metal are similar to glazes, in that they are basically a silicate glass coating, but they are fired for shorter periods and at lower temperatures. During firing, a ground coat containing nickel or cobalt oxide, or a nickel dip (of the metal in a nickel sulfate solution), is frequently used to... 

Cobalt compounds have been in use for centuries, notably as pigments ( cobalt blue ) in glass and porcelain (a double silicate of cobalt and potassium) the metal itself has been produced on an industrial scale only during the twentieth century. Cobalt is relatively uncommon but widely distributed it occurs biologically in vitamin B12 (a complex of cobalt(III) in which the cobalt is bonded octahedrally to nitrogen atoms and the carbon atom of a CN group). In its ores, it is usually in combination with sulphur or arsenic, and other metals, notably copper and silver, are often present. Extraction is carried out by a process essentially similar to that used for iron, but is complicate because of the need to remove arsenic and other metals. 

VIOLET Potassium compounds other than silicates, phosphates and borates rubidium and cesium are similar. Color is masked by lithium and/or sodium, appears purple-red through cobalt glass and bluish-green glass. 

Nelson, C. White, W. B. (1986) Transition metal ions in silicate melts IV. Cobalt in sodium silicate and related glasses. J. Mat. Sci., 1,130-8. 

Boyle et al. ( ) measured the enthalpy of combustion of metallic cobalt at 303.16 K. Their analyses of the combustion products indicated that some overoxidation of the metal had occurred. Correction of their results to correspond to CoO was made on the assumption that the excess oxygen was combined as Co O. Also the analyses indicated that the combustion products had attacked the silica-glass capsules, used to hold the metal samples, resulting in appreciable amounts of silicate formation. Corrections for these two side reactions amounted to three percent of the total measured energy of combustion. From these data, we derive A.H (CoO, cr, 298.15 K) = -57.0 0.3 kcal mol". Roth and Havekoss ( ) also investigated calorimetrically the... 

Basic copper(ll) carbonate Cobalt(ll) stannate Cobalt(ll)-doped alumina glass Calcium copper(ll) silicate Sulfur radical anions in a sodium aluminosilicate matrix Barium manganate(VII) sulfete Copper(ll) phthalocyanine Basic oopper(ll) sulfete Iron(lll) hexacyanoferrate(ll) Cobalt(ll) silicate Basic copper(ll)... 

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