It is composed of silica, alumina, carbonate of lime, magnesia and oxide of iron.
The most important determinations for these are total alkali and silica.
Many of these knives have silica blades, some of the handles being of jade.
silica is soluble in alkaline waters, especially when these are hot.
Hence the relationship of the oxygen in the base to the oxygen in the silica is as one to two.
The successful preparation of this silica matt is extremely difficult.
The powder which originally resisted the muriatic acid, is silica.
The residuum may be examined for silica, lime, barytes, and oxide of titanium.
It consists of silica 25; protoxide of manganese 60; water 13.
United with the silica the element most commonly occurring is aluminum.
"hard silicon dioxide," 1801, Modern Latin, from Latin silex (genitive silicis) "flint, pebble," on model of alumina, soda.
silica sil·i·ca (sĭl'ĭ-kə)
n.
A crystalline compound occurring abundantly as quartz, sand, and many other minerals and used to manufacture a variety of materials, especially glass and concrete.
