from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of numerous compounds containing silicon, oxygen, and one or more metals; a salt of silicic acid.
- n. Any of a large group of minerals, forming over 90 percent of the earth's crust, that consist of SiO2 or SiO4 groupings combined with one or more metals and sometimes hydrogen.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any salt of silica or of one of the silicic acids; any mineral composed of silicates
from the GNU version of the Collaborative International Dictionary of English
- n. A salt of silicic acid.
from The Century Dictionary and Cyclopedia
- n. A salt of silicic acid.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a salt or ester derived from silicic acid
Sorry, no etymologies found.
“Clay” as a mineral refers to a “cousin” of micas; that is, a silicate mineral containing structural sheets of silica tetrahedra tetrahedral arrangements of one Si and 4 Oxygen atoms, with the Oxygen atoms at the 4 corners.
That kind of planet would have to develop differently from Earth, Mars and Venus, so-called silicate planets made up mostly of silicon-oxygen compounds.
The principal ore mineral is uranophane, a hydrated calcium-uranium silicate, which is believed to be an oxidation product of pitchblende.
Silica forms with lime a compound, calcium silicate, which is not very fusible; but when alumina and other oxides are present, as in clays and in most rocky substances, the addition of lime gives a very fusible slag.
By theory,  50 grams of quartz will require 88.5 grams of the carbonate, or 140 grams of the bicarbonate, to form sodium silicate, which is a glassy, easily-fusible substance, making a good slag.
If the bicarbonate is used, and heat is applied gradually, steam and carbonic acid are given off at a comparatively low temperature, and the carbonate is left; at a higher temperature (about 800° C., or a cherry-red heat) the carbonate fuses attacking the quartz, and giving off more carbonic acid; as the heat increases, and the attack on the quartz (which of itself is infusible) becomes complete, the whole mass settles down to a liquid sodium silicate, which is sufficiently fluid to allow the gold and lead to settle to the bottom.
If the child coughs it is given _bans-lochan_, which is said to be some kind of silicate found in bamboos.
"The raw material, some kind of silicate, is melted down in an oven.
The flow of water appears to be decreasing after the company injected about 500 gallons of water glass'' -- sodium silicate -- and another substance into the cracked pit of the No. 2 reactor.
But this also subjects them to infiltration by foreign particles like calcium magnesium alumino silicate (aka CMAS, formed in and near sand particles) or volcanic ash.