Diatomaceous earth
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Diatomaceous earth () also known as D.E., diatomite, or kieselgur/kieselguhr, is a naturally occurring, soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder. It has a particle size ranging from less than 1 micrometre to more than 1 millimeter, but typically 10 to 200 micrometres. This powder has an abrasive feel, similar to pumice powder, and is very light as a result of its high porosity. The typical Chemical composition of oven-dried diatomaceous earth is 80 to 90% silica, with 2 to 4% alumina (attributed mostly to clay minerals) and 0.5 to 2% iron oxide.
- See also: Wikipedia
- Related: Biomineralization, Diatom, Fuller's earth, Perlite, silica aerogel, Zeolite
| Diatomite: Statistics and Information - USGS Diatomite: Statistics and Information - USGS minerals.usgs.gov/minerals/pubs/commodity/diatomite/ - Web |
| Tripolite: Tripolite mineral data Tripolite: Tripolite mineral data www.mindat.org/min-9855.html - Web |
| DIATOMACEOUS EARTH: A Non Toxic Pesticide DIATOMACEOUS EARTH: A Non Toxic Pesticide www.eap.mcgill.ca/publications/eap4.htm - Web |
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