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Novacite Silica 1
Microcrystalline Novaculite
Chemistry
Chemistry available on new site, see link above
Links to Other Materials
- Quartz
Hazards
- Quartz, Crystalline Silica
Miscellaneous
- Family: Silica
- Region: North America
- Mined At: Unspecified
- Raw Mineral: No
- Generic: No
Notes
NovaciteŽ 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
Data
- Sieve Analysis Dry
Percent finer that 74 microns: 99
53 microns: 98
44 microns: 93-98
10 microns: 36
Average parti - Density (loose packed): 50 lbs/cubic foot
- Hardness (Moh): 7
- Particle Shape (1-7 microns): Platey (over 7 microns): Clusters
- Oil Adsorption (Spatula): 17-20%
- pH: 6.0-7.8
- Index of Refraction: 1.55
- Specific Gravity: 2.65
- Specific Gravity: 2.65
- Index of Refraction: 1.55
- pH: 6.0-7.8
- Oil Adsorption (Spatula): 17-20%
- Particle Shape (1-7 microns): Platey (over 7 microns): Clusters
- Hardness (Moh): 7
- Density (loose packed): 50 lbs/cubic foot
- Sieve Analysis Dry
Percent finer that 74 microns: 99
53 microns: 98
44 microns: 93-98
10 microns: 36
Average parti
URLs
- Arkansas Geological Commission - http://www.state.ar.us/agc/novaculi.htm
- Geology information - http://www.fs.fed.us/oonf/history/nova/novaculite.htm
- Quarry pictures - http://www.fs.fed.us/oonf/history/quarry_pic.html
- Product page - http://www.thomasregister.com/olc/malvernminerals/page2.htm
- Product page - http://www.thomasregister.com/olc/malvernminerals/page2.htm
Suppliers
- Malvern Minerals
Authors
- Tony Hansen (Owner)
Pictures
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Emeralds Mix
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