Novacite Silica 1
Alternate Names: Whetstone
Description: Microcrystalline Novaculite
| Oxide | Analysis | Formula | Tolerance |
|---|---|---|---|
| CaO | 0.01% | 0.18 | |
| MgO | 0.02% | 0.51 | |
| TiO2 | 0.01% | 0.13 | |
| Al2O3 | 0.10% | 1.00 | |
| SiO2 | 99.49% | ||
| Fe2O3 | 0.04% | 0.26 | |
| Oxide Weight | 101,663.40 | ||
| Formula Weight | 101,663.40 | ||
Notes
Novacite® is a quartz silica unique in the extender/filler market. Graded by micron size, the individual, unagglomerated particles tend toward a platey structure, which promotes superior leveling, meshing and wear-resistance in many performance applications.
Mined and processed in Hot Springs, Arkansas, USA. The product is a "rotted", or powdered form of Novaculite mineral. It is also known as Arkansas Whetstone because it is a massive white quartz rock used to make whetstones for sharpening knives.
According to the Arkansas Geological Commission it is "a sedimentary rock composed mostly of microcrystalline quartz and is a recrystallized variety of chert. It is dense, hard, white to grayish-black in color, translucent on thin edges, and has a dull to waxy luster.".
Typical applications other than ceramics include casting resins, potting compounds, molding compounds, abrasive medium (wet blasting), latex paints.
Color (Dry): White
Color (Wet): Grey
Particle Shape (1-7 microns): Platey (over 7 microns): Clusters
Specific Heat (mean 0-200C): 192 cal/g/degree C
Surface Modification: Very Receptive
Related Information
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Emeralds Mix
Links
| URLs |
http://www.state.ar.us/agc/novaculi.htm
Arkansas Geological Commission |
| URLs |
http://www.fs.fed.us/oonf/history/nova/novaculite.htm
Geology information |
| URLs |
http://www.fs.fed.us/oonf/history/quarry_pic.html
Quarry pictures |
| URLs |
http://www.thomasregister.com/olc/malvernminerals/page2.htm
Malvern Minerals Product page |
| URLs |
http://www.thomasregister.com/olc/malvernminerals/page2.htm
Malvern Minerals Product Page |
| Typecodes |
Silica/Quartz
Quartz is very abundant and there are many grades and name brands. |
Data
| Density, loose packed (lbs/cu fut) | 50 lbs/cubic foot |
|---|---|
| Hardness (Moh) | 7 |
| Index of Refraction | 1.55 |
| Oil Adsorption (Spatula) | 17-20% |
| Particle Shape (1-7 microns) | Platey (over 7 microns): Clusters |
| Sieve Analysis Dry | Percent finer that 74 microns: 99 53 microns: 98 44 microns: 93-98 10 microns: 36 Average parti |
| Density (Specific Gravity) | 2.65 |
| pH for dry powder | 6.0-7.8 |
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