Granite is radioactive How dangerous that is

Is Granite Radioactive?

Have you ever heard that granite can supposedly be radioactive? What is it about this story? Is granite really weakly radioactive, or is it just a modern fairy tale?

Natural radioactivity

Amazingly, basically everything around us is radioactive. This radioactivity is called natural radioactivity. Even the human body itself is radioactive. Each of us produces an average endogenous radioactivity of around 8000 watercolors. This means that around 8,000 atoms decay every second in an average human body.

Natural radioactivity is created on the one hand by radioactive radiation that falls from space on the earth (so-called cosmic radiation). On the other hand, it arises from the slightest traces of uranium, which can be detected in almost all of the materials around us.

Radioactivity in living areas

The radiation is measured in micro-Sievert per year (mSv / a). The natural radioactivity 0.8 mSv / a is made up of 0.3 mSv / a cosmic radiation and 0.5 mSv / a terrestrial ambient radiation.

In the home, the natural radioactivity caused by uranium accumulates mainly in the walls of the house and in the furniture. In addition, the air is enriched with the noble gas radon, which is also radioactive. However, all this radioactivity is in a range well below the limit values ​​that are dangerous for humans.

And the radioactivity of granite?

Like all other materials - and even the human body itself - granite contains traces of uranium. Granite and other natural stones of volcanic origin contain between 0.5 to 4.0 micrograms (µg) of uranium per gram. Other building materials, materials or the soil contain similar amounts. Normal building sand, for example, contains an average of 3.1 µg uranium per gram.

The stories about the "dangerous" Radioactivity from granite you can confidently banish to the realm of fairy tales.

Links on the subject:

Back to top · Partner · Imprint + Privacy Policy · Contact · © Graniteland