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Physical Properties | Metric | English | Comments |
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Density | 3.60 g/cc | 0.130 lb/in³ |
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Chemical Properties | Metric | English | Comments |
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Acid Class, SR | 52.3 | 52.3 |
Alkali Class, AR | 1.2 | 1.2 |
Stain Resistance Class, FR | 1.0 | 1.0 |
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Mechanical Properties | Metric | English | Comments |
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Hardness, Knoop | 440 | 440 |
Modulus of Elasticity | 78.0 GPa | 11300 ksi |
Poissons Ratio | 0.288 | 0.288 |
Shear Modulus | 30.3 GPa | 4390 ksi |
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Thermal Properties | Metric | English | Comments |
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CTE, linear | 9.40 µm/m-°C @Temperature -30.0 - 70.0 °C | 5.22 µin/in-°F @Temperature -22.0 - 158 °F |
| 10.9 µm/m-°C @Temperature 20.0 - 300 °C | 6.06 µin/in-°F @Temperature 68.0 - 572 °F |
Transformation Temperature, Tg | 618 °C | 1140 °F |
Softening Point | 709 °C | 1310 °F |
Annealing Point | 606 °C | 1120 °F |
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Optical Properties | Metric | English | Comments |
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Refractive Index | 1.592 @Wavelength 2325.4 nm | 1.592 @Wavelength 2325.4 nm |
| 1.597 @Wavelength 1970.1 nm | 1.597 @Wavelength 1970.1 nm |
| 1.602 @Wavelength 1529.6 nm | 1.602 @Wavelength 1529.6 nm |
| 1.608 @Wavelength 1060 nm | 1.608 @Wavelength 1060 nm |
| 1.609 @Wavelength 1014 nm | 1.609 @Wavelength 1014 nm |
| 1.611 @Wavelength 852.1 nm | 1.611 @Wavelength 852.1 nm |
| 1.615 @Wavelength 706.5 nm | 1.615 @Wavelength 706.5 nm |
| 1.617 @Wavelength 643.8 nm | 1.617 @Wavelength 643.8 nm |
| 1.617 @Wavelength 656.3 nm | 1.617 @Wavelength 656.3 nm |
| 1.618 @Wavelength 632.8 nm | 1.618 @Wavelength 632.8 nm |
| 1.62 @Wavelength 587.6 nm | 1.62 @Wavelength 587.6 nm |
| 1.62 @Wavelength 589.3 nm | 1.62 @Wavelength 589.3 nm |
| 1.622 @Wavelength 546.1 nm | 1.622 @Wavelength 546.1 nm |
| 1.626 @Wavelength 486.1 nm | 1.626 @Wavelength 486.1 nm |
| 1.627 @Wavelength 480 nm | 1.627 @Wavelength 480 nm |
| 1.632 @Wavelength 435.8 nm | 1.632 @Wavelength 435.8 nm |
| 1.636 @Wavelength 404.7 nm | 1.636 @Wavelength 404.7 nm |
| 1.644 @Wavelength 365 nm | 1.644 @Wavelength 365 nm |
| 1.652 @Wavelength 344.1 nm | 1.652 @Wavelength 344.1 nm |
Abbe Number | 63.19 | 63.19 |
| 63.48 | 63.48 |
Optical Dispersion | 0.009769 | 0.009769 |
| 0.009851 | 0.009851 |
Transmission, Visible | 97.9 % @Thickness 25.0 mm, Wavelength 420 nm | 97.9 % @Thickness 0.984 in, Wavelength 420 nm |
| 98.2 % @Thickness 25.0 mm, Wavelength 436 nm | 98.2 % @Thickness 0.984 in, Wavelength 436 nm |
| 98.6 % @Thickness 25.0 mm, Wavelength 460 nm | 98.6 % @Thickness 0.984 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 10.0 mm, Wavelength 420 nm | 99.2 % @Thickness 0.394 in, Wavelength 420 nm |
| 99.2 % @Thickness 25.0 mm, Wavelength 500 nm | 99.2 % @Thickness 0.984 in, Wavelength 500 nm |
| 99.3 % @Thickness 25.0 mm, Wavelength 660 nm | 99.3 % @Thickness 0.984 in, Wavelength 660 nm |
| 99.3 % @Thickness 10.0 mm, Wavelength 436 nm | 99.3 % @Thickness 0.394 in, Wavelength 436 nm |
| 99.4 % @Thickness 10.0 mm, Wavelength 460 nm | 99.4 % @Thickness 0.394 in, Wavelength 460 nm |
| 99.4 % @Thickness 25.0 mm, Wavelength 700 nm | 99.4 % @Thickness 0.984 in, Wavelength 700 nm |
| 99.4 % @Thickness 25.0 mm, Wavelength 580 nm | 99.4 % @Thickness 0.984 in, Wavelength 580 nm |
| 99.5 % @Thickness 25.0 mm, Wavelength 546 nm | 99.5 % @Thickness 0.984 in, Wavelength 546 nm |
| 99.7 % @Thickness 10.0 mm, Wavelength 500 nm | 99.7 % @Thickness 0.394 in, Wavelength 500 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 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 |
| 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 546 nm | 99.8 % @Thickness 0.394 in, Wavelength 546 nm |
IR Transmittance | 29 % @Thickness 25.0 mm, Wavelength 2500 nm | 29 % @Thickness 0.984 in, Wavelength 2500 nm |
| 51 % @Thickness 25.0 mm, Wavelength 2325 nm | 51 % @Thickness 0.984 in, Wavelength 2325 nm |
| 60.9 % @Thickness 10.0 mm, Wavelength 2500 nm | 60.9 % @Thickness 0.394 in, Wavelength 2500 nm |
| 76.4 % @Thickness 10.0 mm, Wavelength 2325 nm | 76.4 % @Thickness 0.394 in, Wavelength 2325 nm |
| 80 % @Thickness 25.0 mm, Wavelength 1970 nm | 80 % @Thickness 0.984 in, Wavelength 1970 nm |
| 91.5 % @Thickness 10.0 mm, Wavelength 1970 nm | 91.5 % @Thickness 0.394 in, Wavelength 1970 nm |
| 95.6 % @Thickness 25.0 mm, Wavelength 1530 nm | 95.6 % @Thickness 0.984 in, Wavelength 1530 nm |
| 98.2 % @Thickness 10.0 mm, Wavelength 1530 nm | 98.2 % @Thickness 0.394 in, Wavelength 1530 nm |
| 99.4 % @Thickness 25.0 mm, Wavelength 1060 nm | 99.4 % @Thickness 0.984 in, Wavelength 1060 nm |
| 99.8 % @Thickness 10.0 mm, Wavelength 1060 nm | 99.8 % @Thickness 0.394 in, Wavelength 1060 nm |
UV Transmittance | 3.0 % @Thickness 25.0 mm, Wavelength 320 nm | 3.0 % @Thickness 0.984 in, Wavelength 320 nm |
| 6.1 % @Thickness 10.0 mm, Wavelength 310 nm | 6.1 % @Thickness 0.394 in, Wavelength 310 nm |
| 20 % @Thickness 25.0 mm, Wavelength 334 nm | 20 % @Thickness 0.984 in, Wavelength 334 nm |
| 23 % @Thickness 10.0 mm, Wavelength 320 nm | 23 % @Thickness 0.394 in, Wavelength 320 nm |
| 52.5 % @Thickness 10.0 mm, Wavelength 334 nm | 52.5 % @Thickness 0.394 in, Wavelength 334 nm |
| 53 % @Thickness 25.0 mm, Wavelength 350 nm | 53 % @Thickness 0.984 in, Wavelength 350 nm |
| 77.6 % @Thickness 10.0 mm, Wavelength 350 nm | 77.6 % @Thickness 0.394 in, Wavelength 350 nm |
| 78 % @Thickness 25.0 mm, Wavelength 365 nm | 78 % @Thickness 0.984 in, Wavelength 365 nm |
| 90 % @Thickness 25.0 mm, Wavelength 380 nm | 90 % @Thickness 0.984 in, Wavelength 380 nm |
| 90.5 % @Thickness 10.0 mm, Wavelength 365 nm | 90.5 % @Thickness 0.394 in, Wavelength 365 nm |
| 92.8 % @Thickness 10.0 mm, Wavelength 370 nm | 92.8 % @Thickness 0.394 in, Wavelength 370 nm |
| 93 % @Thickness 25.0 mm, Wavelength 370 nm | 93 % @Thickness 0.984 in, Wavelength 370 nm |
| 94 % @Thickness 25.0 mm, Wavelength 390 nm | 94 % @Thickness 0.984 in, Wavelength 390 nm |
| 95.9 % @Thickness 10.0 mm, Wavelength 380 nm | 95.9 % @Thickness 0.394 in, Wavelength 380 nm |
| 96.4 % @Thickness 25.0 mm, Wavelength 400 nm | 96.4 % @Thickness 0.984 in, Wavelength 400 nm |
| 97 % @Thickness 25.0 mm, Wavelength 405 nm | 97 % @Thickness 0.984 in, Wavelength 405 nm |
| 97.6 % @Thickness 10.0 mm, Wavelength 390 nm | 97.6 % @Thickness 0.394 in, Wavelength 390 nm |
| 98.5 % @Thickness 10.0 mm, Wavelength 400 nm | 98.5 % @Thickness 0.394 in, Wavelength 400 nm |
| 98.8 % @Thickness 10.0 mm, Wavelength 405 nm | 98.8 % @Thickness 0.394 in, Wavelength 405 nm |
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Descriptive Properties |
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Climatic resistance | 2 |
Grindability | 6 |
Phosphate resistance | 4.3 |
Stress optical coefficient | 1.16 |