(aq) refers to aqueous, which means: in water. In your case, you have Ba(OH)2 in solution in water http://en.wikipedia.org/wiki/Aqueous. As for your search on Google, just try anything that works. Internet is a wild untamed land where order and rigorous classification do not apply. Wikipedia is usually a good start.
/bÉËsÉËlt/ , /ËbaesÉlt/ , /ËbÃ¦sÉlt/ , ËbaesÉËlt /ËbÃ¦sÉËlt/) or ËbeÉªsÉËlt is a common (extrusive) igneous volcanic rock formed from the rapid cooling of basaltic lava exposed at or very near the surface of a planet. Or moon flood basalt describes the formation in a series of lava. basalt flowsy definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase.
Basalt is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes, so it's one kind of igneous rock. When the lava cools quickly, it turns into basalt.Usually basalt is black or gray. Basalt is a mixture of feldspar and pyroxene, a rock made mainly of silica and oxygen.asalt is pretty common on Earth, and there is also a lot of basalt on the Moon, and on other planets including Mars and Venus. Like granite, basalt is a very hard rock. Because it is a common rock and so hard, people used basalt for early choppers and for grinding stones for grinding grains like millet and barley.