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Physical Properties | Metric | English | Comments |
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Density | 4.58 g/cc | 0.165 lb/in³ |
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Chemical Properties | Metric | English | Comments |
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Acid Class, SR | 51.3 | 51.3 |
Alkali Class, AR | 1.0 | 1.0 |
Stain Resistance Class, FR | 1.0 | 1.0 |
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Mechanical Properties | Metric | English | Comments |
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Hardness, Knoop | 722 | 722 |
Modulus of Elasticity | 119 GPa | 17300 ksi |
Poissons Ratio | 0.299 | 0.299 |
Shear Modulus | 45.8 GPa | 6640 ksi |
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Thermal Properties | Metric | English | Comments |
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CTE, linear | 6.00 µm/m-°C @Temperature -30.0 - 70.0 °C | 3.33 µin/in-°F @Temperature -22.0 - 158 °F |
| 7.40 µm/m-°C @Temperature 20.0 - 300 °C | 4.11 µin/in-°F @Temperature 68.0 - 572 °F |
Specific Heat Capacity | 0.560 J/g-°C | 0.134 BTU/lb-°F |
Thermal Conductivity | 0.870 W/m-K | 6.04 BTU-in/hr-ft²-°F |
Transformation Temperature, Tg | 526 °C | 979 °F |
Softening Point | 629 °C | 1160 °F |
Annealing Point | 534 °C | 993 °F |
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Optical Properties | Metric | English | Comments |
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Refractive Index | 1.764 @Wavelength 2323.4 nm | 1.764 @Wavelength 2323.4 nm |
| 1.771 @Wavelength 1970.1 nm | 1.771 @Wavelength 1970.1 nm |
| 1.778 @Wavelength 1060 nm | 1.778 @Wavelength 1060 nm |
| 1.779 @Wavelength 1529.6 nm | 1.779 @Wavelength 1529.6 nm |
| 1.789 @Wavelength 1014 nm | 1.789 @Wavelength 1014 nm |
| 1.794 @Wavelength 852.1 nm | 1.794 @Wavelength 852.1 nm |
| 1.80 @Wavelength 706.5 nm | 1.80 @Wavelength 706.5 nm |
| 1.804 @Wavelength 656.3 nm | 1.804 @Wavelength 656.3 nm |
| 1.805 @Wavelength 632.8 nm | 1.805 @Wavelength 632.8 nm |
| 1.805 @Wavelength 643.8 nm | 1.805 @Wavelength 643.8 nm |
| 1.809 @Wavelength 589.3 nm | 1.809 @Wavelength 589.3 nm |
| 1.81 @Wavelength 587.6 nm | 1.81 @Wavelength 587.6 nm |
| 1.814 @Wavelength 546.1 nm | 1.814 @Wavelength 546.1 nm |
| 1.82390 @Wavelength 486.1 nm | 1.82390 @Wavelength 486.1 nm |
| 1.825 @Wavelength 480 nm | 1.825 @Wavelength 480 nm |
| 1.835 @Wavelength 435.8 nm | 1.835 @Wavelength 435.8 nm |
| 1.844 @Wavelength 404.7 nm | 1.844 @Wavelength 404.7 nm |
| 1.861 @Wavelength 365 nm | 1.861 @Wavelength 365 nm |
| 1.88 @Wavelength 334.1 nm | 1.88 @Wavelength 334.1 nm |
Abbe Number | 40.68 | 40.68 |
| 40.93 | 40.93 |
Optical Dispersion | 0.019792 | 0.019792 |
| 0.020025 | 0.020025 |
Transmission, Visible | 95 % @Thickness 25.0 mm, Wavelength 420 nm | 95 % @Thickness 0.984 in, Wavelength 420 nm |
| 96.3 % @Thickness 25.0 mm, Wavelength 436 nm | 96.3 % @Thickness 0.984 in, Wavelength 436 nm |
| 97.5 % @Thickness 25.0 mm, Wavelength 460 nm | 97.5 % @Thickness 0.984 in, Wavelength 460 nm |
| 98 % @Thickness 10.0 mm, Wavelength 420 nm | 98 % @Thickness 0.394 in, Wavelength 420 nm |
| 98.5 % @Thickness 10.0 mm, Wavelength 436 nm | 98.5 % @Thickness 0.394 in, Wavelength 436 nm |
| 98.7 % @Thickness 25.0 mm, Wavelength 500 nm | 98.7 % @Thickness 0.984 in, Wavelength 500 nm |
| 99 % @Thickness 10.0 mm, Wavelength 460 nm | 99 % @Thickness 0.394 in, Wavelength 460 nm |
| 99.2 % @Thickness 25.0 mm, Wavelength 620 nm | 99.2 % @Thickness 0.984 in, Wavelength 620 nm |
| 99.2 % @Thickness 25.0 mm, Wavelength 546 nm | 99.2 % @Thickness 0.984 in, Wavelength 546 nm |
| 99.2 % @Thickness 25.0 mm, Wavelength 580 nm | 99.2 % @Thickness 0.984 in, Wavelength 580 nm |
| 99.3 % @Thickness 25.0 mm, Wavelength 660 nm | 99.3 % @Thickness 0.984 in, Wavelength 660 nm |
| 99.5 % @Thickness 25.0 mm, Wavelength 700 nm | 99.5 % @Thickness 0.984 in, Wavelength 700 nm |
| 99.5 % @Thickness 10.0 mm, Wavelength 500 nm | 99.5 % @Thickness 0.394 in, Wavelength 500 nm |
| 99.7 % @Thickness 10.0 mm, Wavelength 546 nm | 99.7 % @Thickness 0.394 in, Wavelength 546 nm |
| 99.7 % @Thickness 10.0 mm, Wavelength 660 nm | 99.7 % @Thickness 0.394 in, Wavelength 660 nm |
| 99.7 % @Thickness 10.0 mm, Wavelength 580 nm | 99.7 % @Thickness 0.394 in, Wavelength 580 nm |
| 99.7 % @Thickness 10.0 mm, Wavelength 620 nm | 99.7 % @Thickness 0.394 in, Wavelength 620 nm |
| 99.8 % @Thickness 10.0 mm, Wavelength 700 nm | 99.8 % @Thickness 0.394 in, Wavelength 700 nm |
IR Transmittance | 20 % @Thickness 25.0 mm, Wavelength 2500 nm | 20 % @Thickness 0.984 in, Wavelength 2500 nm |
| 52.5 % @Thickness 10.0 mm, Wavelength 2500 nm | 52.5 % @Thickness 0.394 in, Wavelength 2500 nm |
| 53 % @Thickness 25.0 mm, Wavelength 2325 nm | 53 % @Thickness 0.984 in, Wavelength 2325 nm |
| 77.6 % @Thickness 10.0 mm, Wavelength 2325 nm | 77.6 % @Thickness 0.394 in, Wavelength 2325 nm |
| 88 % @Thickness 25.0 mm, Wavelength 1970 nm | 88 % @Thickness 0.984 in, Wavelength 1970 nm |
| 95 % @Thickness 10.0 mm, Wavelength 1970 nm | 95 % @Thickness 0.394 in, Wavelength 1970 nm |
| 98.1 % @Thickness 25.0 mm, Wavelength 1530 nm | 98.1 % @Thickness 0.984 in, Wavelength 1530 nm |
| 99.2 % @Thickness 10.0 mm, Wavelength 1530 nm | 99.2 % @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 | 1.2 % @Thickness 10.0 mm, Wavelength 320 nm | 1.2 % @Thickness 0.394 in, Wavelength 320 nm |
| 3.0 % @Thickness 25.0 mm, Wavelength 334 nm | 3.0 % @Thickness 0.984 in, Wavelength 334 nm |
| 25 % @Thickness 10.0 mm, Wavelength 334 nm | 25 % @Thickness 0.394 in, Wavelength 334 nm |
| 35 % @Thickness 25.0 mm, Wavelength 350 nm | 35 % @Thickness 0.984 in, Wavelength 350 nm |
| 65 % @Thickness 25.0 mm, Wavelength 365 nm | 65 % @Thickness 0.984 in, Wavelength 365 nm |
| 65.7 % @Thickness 10.0 mm, Wavelength 350 nm | 65.7 % @Thickness 0.394 in, Wavelength 350 nm |
| 72 % @Thickness 25.0 mm, Wavelength 370 nm | 72 % @Thickness 0.984 in, Wavelength 370 nm |
| 83 % @Thickness 25.0 mm, Wavelength 380 nm | 83 % @Thickness 0.984 in, Wavelength 380 nm |
| 84.2 % @Thickness 10.0 mm, Wavelength 365 nm | 84.2 % @Thickness 0.394 in, Wavelength 365 nm |
| 87.7 % @Thickness 10.0 mm, Wavelength 370 nm | 87.7 % @Thickness 0.394 in, Wavelength 370 nm |
| 89 % @Thickness 25.0 mm, Wavelength 390 nm | 89 % @Thickness 0.984 in, Wavelength 390 nm |
| 92 % @Thickness 25.0 mm, Wavelength 400 nm | 92 % @Thickness 0.984 in, Wavelength 400 nm |
| 92.8 % @Thickness 10.0 mm, Wavelength 380 nm | 92.8 % @Thickness 0.394 in, Wavelength 380 nm |
| 93 % @Thickness 25.0 mm, Wavelength 405 nm | 93 % @Thickness 0.984 in, Wavelength 405 nm |
| 95.4 % @Thickness 10.0 mm, Wavelength 390 nm | 95.4 % @Thickness 0.394 in, Wavelength 390 nm |
| 96.7 % @Thickness 10.0 mm, Wavelength 400 nm | 96.7 % @Thickness 0.394 in, Wavelength 400 nm |
| 97.1 % @Thickness 10.0 mm, Wavelength 405 nm | 97.1 % @Thickness 0.394 in, Wavelength 405 nm |
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Descriptive Properties |
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Acid resistance class | 3 |
Climatic resistance | 1 |
Grindability | 66 |
Phosphate resistance | 2.2 |
Stress optical coefficient | 2.32 |
Water resistance class | 1 |
Yield point/sag temperature | 570°C |