Matter
- Name
- Volcanic tuff / Corent - < 25µm grains
- Family
- mineral
- Database
- Experimentalists
- Parent matter
- Volcanic tuff (Corent)
- Level
- local matter
- Origins
- natural terrestrial
- Provider
- IPAG
- Local reference code
- Tuff (Corent) 0-25mic
- Body name
- Earth
- Terrain type
- mineral subsurface
- Place
- Grande carrière de pouzzolane de Corent (Puy-de-Dôme) , Auvergne-Rhône-Alpes , France
Coordinates
- System
- WGS84
- Position type
- point
- Geolocation
-
Point Latitude Longitude Altitude #1 45.6598° 3.1844° - Comments
- scree at the bottom of the quarry
- Preparation
- sieved fraction
- Method
- sieved with a mesh of 25µm
- Phase type
- solid
- Component type (group)
- igneous rock (pyroclastic rock or sediment)
- Texture
- pulverulent
- Type of porosity
- open pores
- Grain sizes
-
Grains Size min Size max Size median Size width Size mass fraction Grain shape #1 25.0 ${\mu}m$ 1.0 irregular - Size distribution
- important coating of a very fine dust on the surface of the smallest grains
- Size method
- sieved with a mesh of 25µm
- Comments
- complex shapes
- Oxides
-
Formula $SiO_{2}$ $Al_{2}O_{3}$ $Fe_{2}O_{3}$ $TiO_{2}$ $CaO$ $MgO$ $Na_{2}O$ $K_{2}O$ Mass fraction (%) 43.0 13.4 13.0 4.0 11.82 7.59 2.8 1.76 - Oxides comments
- loss on ignition: 2.25% - average values over the quarry
- Title
- Sieving 0-25 µm grains of volcanic tuff
- Matters
- Matter
- Volcanic tuff / Corent - < 25µm grains (this matter)
- Processing steps
-
Step Date Type Process Changes #1 2006-01-01 mechanical grinding the raw matter from block to powder #2 2006-01-01 mechanical manual dry sieving of the raw matter with sieve mesh of 25 µm powder with grain size below 25 µm