What are the states of silicon dioxide?
A colorless crystalline crystalline substance of quartz; usually crystalline. Having a band or layer of colored rings called agate (containing impurities).
Silica widely exists in nature and forms rocks with other minerals. Natural silica, which is about 12% of the earth's crust, is composed of two kinds of crystalline and indefinite forms. Quartz crystals are crystalline silica with different crystalline shapes and colors.
There are two kinds of crystalline silica and amorphous silica in nature.
The moon quartz mineral was first discovered in a few pieces of broken granite, in petrosilex also filled a lot of cristobalite minerals from the analysis show that the micro structure and composition of the quartz is actually changing over from cristobalite. Later in the coarse crystalline moon crushed granite is also found in quartz minerals, according to the analysis results, the isotopes of these minerals is about 4 billion 100 million years, the formation of crystals in the deep environment, indicating that these silica is not formed during crystal formation in magmatite.
Silica mineral refers to the same chemical formula (SiO), but there are differences in the structure of minerals, these minerals are called as different as the main body, including quartz, cristobalite and tridymite. These minerals on earth is mainly found in granite, sandstone and black siliceous rocks, while the moon is almost lacking, the main reason is: the evolution of chemical composition, the formation of the moon lunar crust a low silicon, high aluminum, high silicon granitic rocks are extremely rare; the moon in evolution as the lack of ball. There is a crystallization of silica mineral water and hot water system. Although silica minerals are extremely rare on lunar rocks, they play an important role in the classification and genesis of lunar rocks.
