Garnet
Natural Abrasive |
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TECHINICAL
DATA AND PHYSICAL CHARACTERSTICS FOR CHROMA ABRASSIVES GRAINS
AND POWERED. |
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Combination
of Almandite & Pyrope |
General Description: chroma abrassives are homogeneous mineral,
contains no free chemicals. All oxides and Dioxides are
combined chemically as follows: Fe2O3Al2
(SiO4)3. The iron and aluminums
are partially replaceable calcium, magnesium and manganese.
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| High
Productivity |
Silicon Dioxide |
(SiO2) |
41.34% |
| Ferrous Oxide |
(FeO) |
9.72% |
| Ferric Oxide |
(Fe2O3) |
12.55% |
| Aluminum Oxide |
(Al2O3) |
20.36% |
| Calcium Oxide |
(CaO) |
2.97% |
| Magnesium Oxide |
(MgO) |
12.35% |
| Manganese Oxdie |
(MnO) |
0.85% |
| Total |
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100.14% |
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| Hardness |
Between 7 & 9 on Mohs Scale. |
Strength |
Friable to tough |
| Particle
Shape |
Sharp, angular, irregular |
Cleavage |
Pronounced laminations, irregular cleavage planes. |
| Color |
Red to pink |
Streaks |
White |
| Transpancy |
Translucent |
Lustre |
Vitreous |
| Specific
Gravity |
3.9 to 4.1 |
Mean
Refractive Index |
1.83 |
| Facet
Angles |
37oC & 42oP |
Crystalization |
Cubic (isometric) system as rhombic dodecahedrons or
tetragonal trisoctahedrons (trapezohedrons) or in combinations
of the two. |
| Melting
Point |
1,3150C - (2,399oF) |
Magnetism |
Slightly magnetic (volume susceptibility = 9.999375).
Electrostatic Properties: a) Mineral conductivity - 18,000
volts. b) Non-reversible. Properties: a) Mineral conductivity
- 18,000 volts. b) Non-reversible. |
| Moisture
Absorbtion |
Non-hygroscopic, inert. |
Dispersion |
Self-dispersing. |
| Uniformity |
All chroma abrassives was formed simultaneously under
identical natural conditions and has been proven uniform
throughout during over 100 years of use in technical abrasive
applications. |
Pathological
Effects |
None |
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