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Physical Properties | Metric | English | Comments |
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Density | 3.05 g/cc | 0.110 lb/in³ |
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Chemical Properties | Metric | English | Comments |
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Acid Class, SR | 1.2 | 1.2 |
Alkali Class, AR | 1.0 | 1.0 |
Stain Resistance Class, FR | 0.00 | 0.00 |
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Mechanical Properties | Metric | English | Comments |
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Hardness, Knoop | 550 | 550 |
Modulus of Elasticity | 77.0 GPa | 11200 ksi |
Poissons Ratio | 0.24 | 0.24 |
Shear Modulus | 31.0 GPa | 4500 ksi |
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Thermal Properties | Metric | English | Comments |
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CTE, linear | 7.00 µm/m-°C @Temperature -30.0 - 70.0 °C | 3.89 µin/in-°F @Temperature -22.0 - 158 °F |
| 7.90 µm/m-°C @Temperature 20.0 - 300 °C | 4.39 µin/in-°F @Temperature 68.0 - 572 °F |
Specific Heat Capacity | 0.680 J/g-°C | 0.163 BTU/lb-°F |
Thermal Conductivity | 0.880 W/m-K | 6.11 BTU-in/hr-ft²-°F |
Transformation Temperature, Tg | 581 °C | 1080 °F |
Softening Point | 569 °C | 1060 °F |
Annealing Point | 581 °C | 1080 °F |
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Optical Properties | Metric | English | Comments |
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Refractive Index | 1.54 @Wavelength 2323.4 nm | 1.54 @Wavelength 2323.4 nm |
| 1.546 @Wavelength 1970.1 nm | 1.546 @Wavelength 1970.1 nm |
| 1.551 @Wavelength 1529.6 nm | 1.551 @Wavelength 1529.6 nm |
| 1.556 @Wavelength 1060 nm | 1.556 @Wavelength 1060 nm |
| 1.557 @Wavelength 1014 nm | 1.557 @Wavelength 1014 nm |
| 1.56 @Wavelength 852.1 nm | 1.56 @Wavelength 852.1 nm |
| 1.564 @Wavelength 706.5 nm | 1.564 @Wavelength 706.5 nm |
| 1.565 @Wavelength 656.3 nm | 1.565 @Wavelength 656.3 nm |
| 1.566 @Wavelength 632.8 nm | 1.566 @Wavelength 632.8 nm |
| 1.566 @Wavelength 643.8 nm | 1.566 @Wavelength 643.8 nm |
| 1.568 @Wavelength 587.6 nm | 1.568 @Wavelength 587.6 nm |
| 1.568 @Wavelength 589.3 nm | 1.568 @Wavelength 589.3 nm |
| 1.571 @Wavelength 546.1 nm | 1.571 @Wavelength 546.1 nm |
| 1.575 @Wavelength 486.1 nm | 1.575 @Wavelength 486.1 nm |
| 1.579 @Wavelength 480 nm | 1.579 @Wavelength 480 nm |
| 1.581 @Wavelength 435.8 nm | 1.581 @Wavelength 435.8 nm |
| 1.586 @Wavelength 404.7 nm | 1.586 @Wavelength 404.7 nm |
| 1.594 @Wavelength 365 nm | 1.594 @Wavelength 365 nm |
Abbe Number | 55.7 | 55.7 |
| 55.98 | 55.98 |
Optical Dispersion | 0.010162 | 0.010162 |
| 0.010255 | 0.010255 |
Transmission, Visible | 99.2 % @Thickness 25.0 mm, Wavelength 420 nm | 99.2 % @Thickness 0.984 in, Wavelength 420 nm |
| 99.3 % @Thickness 25.0 mm, Wavelength 436 nm | 99.3 % @Thickness 0.984 in, Wavelength 436 nm |
| 99.5 % @Thickness 25.0 mm, Wavelength 460 nm | 99.5 % @Thickness 0.984 in, Wavelength 460 nm |
| 99.6 % @Thickness 25.0 mm, Wavelength 620 nm | 99.6 % @Thickness 0.984 in, Wavelength 620 nm |
| 99.6 % @Thickness 25.0 mm, Wavelength 660 nm | 99.6 % @Thickness 0.984 in, Wavelength 660 nm |
| 99.6 % @Thickness 25.0 mm, Wavelength 700 nm | 99.6 % @Thickness 0.984 in, Wavelength 700 nm |
| 99.6 % @Thickness 25.0 mm, Wavelength 500 nm | 99.6 % @Thickness 0.984 in, Wavelength 500 nm |
| 99.6 % @Thickness 25.0 mm, Wavelength 580 nm | 99.6 % @Thickness 0.984 in, Wavelength 580 nm |
| 99.6 % @Thickness 25.0 mm, Wavelength 546 nm | 99.6 % @Thickness 0.984 in, Wavelength 546 nm |
| 99.7 % @Thickness 10.0 mm, Wavelength 436 nm | 99.7 % @Thickness 0.394 in, Wavelength 436 nm |
| 99.7 % @Thickness 10.0 mm, Wavelength 420 nm | 99.7 % @Thickness 0.394 in, Wavelength 420 nm |
| 99.8 % @Thickness 10.0 mm, Wavelength 460 nm | 99.8 % @Thickness 0.394 in, Wavelength 460 nm |
| 99.8 % @Thickness 10.0 mm, Wavelength 660 nm | 99.8 % @Thickness 0.394 in, Wavelength 660 nm |
| 99.8 % @Thickness 10.0 mm, Wavelength 620 nm | 99.8 % @Thickness 0.394 in, Wavelength 620 nm |
| 99.8 % @Thickness 10.0 mm, Wavelength 580 nm | 99.8 % @Thickness 0.394 in, Wavelength 580 nm |
| 99.8 % @Thickness 10.0 mm, Wavelength 500 nm | 99.8 % @Thickness 0.394 in, Wavelength 500 nm |
| 99.8 % @Thickness 10.0 mm, Wavelength 700 nm | 99.8 % @Thickness 0.394 in, Wavelength 700 nm |
| 99.8 % @Thickness 10.0 mm, Wavelength 546 nm | 99.8 % @Thickness 0.394 in, Wavelength 546 nm |
IR Transmittance | 67.3 % @Thickness 25.0 mm, Wavelength 2500 nm | 67.3 % @Thickness 0.984 in, Wavelength 2500 nm |
| 81.1 % @Thickness 25.0 mm, Wavelength 2325 nm | 81.1 % @Thickness 0.984 in, Wavelength 2325 nm |
| 85.4 % @Thickness 10.0 mm, Wavelength 2500 nm | 85.4 % @Thickness 0.394 in, Wavelength 2500 nm |
| 92 % @Thickness 10.0 mm, Wavelength 2325 nm | 92 % @Thickness 0.394 in, Wavelength 2325 nm |
| 94.9 % @Thickness 25.0 mm, Wavelength 1970 nm | 94.9 % @Thickness 0.984 in, Wavelength 1970 nm |
| 97.9 % @Thickness 10.0 mm, Wavelength 1970 nm | 97.9 % @Thickness 0.394 in, Wavelength 1970 nm |
| 99.1 % @Thickness 25.0 mm, Wavelength 1530 nm | 99.1 % @Thickness 0.984 in, Wavelength 1530 nm |
| 99.6 % @Thickness 10.0 mm, Wavelength 1530 nm | 99.6 % @Thickness 0.394 in, Wavelength 1530 nm |
| 99.8 % @Thickness 25.0 mm, Wavelength 1060 nm | 99.8 % @Thickness 0.984 in, Wavelength 1060 nm |
| 99.9 % @Thickness 10.0 mm, Wavelength 1060 nm | 99.9 % @Thickness 0.394 in, Wavelength 1060 nm |
UV Transmittance | 1.5 % @Thickness 10.0 mm, Wavelength 320 nm | 1.5 % @Thickness 0.394 in, Wavelength 320 nm |
| 9.5 % @Thickness 25.0 mm, Wavelength 334 nm | 9.5 % @Thickness 0.984 in, Wavelength 334 nm |
| 39 % @Thickness 10.0 mm, Wavelength 334 nm | 39 % @Thickness 0.394 in, Wavelength 334 nm |
| 59.5 % @Thickness 25.0 mm, Wavelength 350 nm | 59.5 % @Thickness 0.984 in, Wavelength 350 nm |
| 81.2 % @Thickness 10.0 mm, Wavelength 350 nm | 81.2 % @Thickness 0.394 in, Wavelength 350 nm |
| 85.9 % @Thickness 25.0 mm, Wavelength 365 nm | 85.9 % @Thickness 0.984 in, Wavelength 365 nm |
| 90 % @Thickness 25.0 mm, Wavelength 370 nm | 90 % @Thickness 0.984 in, Wavelength 370 nm |
| 94.1 % @Thickness 10.0 mm, Wavelength 365 nm | 94.1 % @Thickness 0.394 in, Wavelength 365 nm |
| 94.9 % @Thickness 25.0 mm, Wavelength 380 nm | 94.9 % @Thickness 0.984 in, Wavelength 380 nm |
| 95.9 % @Thickness 10.0 mm, Wavelength 370 nm | 95.9 % @Thickness 0.394 in, Wavelength 370 nm |
| 97.2 % @Thickness 25.0 mm, Wavelength 390 nm | 97.2 % @Thickness 0.984 in, Wavelength 390 nm |
| 97.9 % @Thickness 10.0 mm, Wavelength 380 nm | 97.9 % @Thickness 0.394 in, Wavelength 380 nm |
| 98.3 % @Thickness 25.0 mm, Wavelength 390 nm | 98.3 % @Thickness 0.984 in, Wavelength 390 nm |
| 98.5 % @Thickness 25.0 mm, Wavelength 400 nm | 98.5 % @Thickness 0.984 in, Wavelength 400 nm |
| 98.9 % @Thickness 10.0 mm, Wavelength 390 nm | 98.9 % @Thickness 0.394 in, Wavelength 390 nm |
| 99.1 % @Thickness 25.0 mm, Wavelength 405 nm | 99.1 % @Thickness 0.984 in, Wavelength 405 nm |
| 99.3 % @Thickness 10.0 mm, Wavelength 390 nm | 99.3 % @Thickness 0.394 in, Wavelength 390 nm |
| 99.4 % @Thickness 10.0 mm, Wavelength 400 nm | 99.4 % @Thickness 0.394 in, Wavelength 400 nm |
| 99.6 % @Thickness 10.0 mm, Wavelength 405 nm | 99.6 % @Thickness 0.394 in, Wavelength 405 nm |
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Descriptive Properties |
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Climatic resistance | 1 |
Grindability | 2 |
Phosphate resistance | 1 |
Stress optical coefficient | 2.9 |