quartz crystals

This is the purest form of silica. It is used in the preparation of expensive lenses and prisms. The colored variety of quartz is used as gem..

The Seven Crystal System - Crystals along with suitable examples are listed in the table. System Axial distances Axial angles Examples Cubic a = b = c α = β = γ = 90° NaCl,KCl, Diamond, Cu, Ag Tetragonal a = b ≠ c α = β = γ = 90° Whit..

Time is measured by electrical oscillators, electronic oscillators, quartz and crystal clocks, atomic clocks, decay of elementary particles and radioactive datin..

Discovery of Optical Activity The earliest optically active substances were all inorganic like quartz, rock crystals and so on. Later crystals of potassium chlorate, potassium bromate and sodium periodate were also found to exhibit optical activity. Howeve..

Silica is widely distributed in nature as sand. It is found in nature in many different forms: i) Quartz or rock crystal ii) Sand iii) Artificial sili..

Solids have definite shape and volume because the average distance between the molecules or atoms remain constant and do not change with time. The arrangement of molecules inside a solid differ from one to another. This results in two types of solids Crystalline solids Amorphous solids In crystalli..