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Meaning
"Ug" is a unit of weight, referring to micrograms. There are 1 million ug in 1 gram. "M3" is a unit of volume, referring to cubic meters. Therefore, ug/m3 is a measurement of density in micrograms per cubic meter.
Uses
Quartz has a variety of industrial and decorative uses, and different quartz densities may be desirable for different applications. Quartz is used in glass-making, optical instruments, as a source of pure silicon and as one of the ingredients in sand.
Values
Because there are 1 million ug in a gram; and 1 million cubic centimeters in 1 cubic meter, values for the density of quartz are the same whether measured in ug/m3 or in grams per cubic centimeter. The density of quartz is typically between 2.6 and 2.65 ug/m3, with a density of 2.62 ug/m3 considered average.