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Physical Properties | Metric | English | Comments |
---|
Specific Gravity | 3.98 g/cc | 3.98 g/cc |
|
Chemical Properties | Metric | English | Comments |
---|
Acid Class, SR | 52 | 52 |
|
Mechanical Properties | Metric | English | Comments |
---|
Hardness, Knoop | 720 @Load 0.0999 kg | 720 @Load 0.220 lb |
Modulus of Elasticity | 119.8 GPa | 17380 ksi |
Modulus of Rigidity | 46.3 GPa | 6720 ksi |
Poissons Ratio | 0.295 | 0.295 |
Abrasion | 65 | 65 |
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Thermal Properties | Metric | English | Comments |
---|
CTE, linear | 5.40 µm/m-°C @Temperature -30.0 - 70.0 °C | 3.00 µin/in-°F @Temperature -22.0 - 158 °F |
| 6.90 µm/m-°C @Temperature 100 - 300 °C | 3.83 µin/in-°F @Temperature 212 - 572 °F |
Thermal Conductivity | 0.895 W/m-K @Temperature 35.0 °C | 6.21 BTU-in/hr-ft²-°F @Temperature 95.0 °F |
Transformation Temperature, Tg | 644 °C | 1190 °F |
Softening Point | 708 °C | 1310 °F |
Annealing Point | 634 °C | 1170 °F |
Strain Point | 610 °C | 1130 °F |
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Optical Properties | Metric | English | Comments |
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Refractive Index | 1.68912 @Wavelength 2325.42 nm | 1.68912 @Wavelength 2325.42 nm |
| 1.69682 @Wavelength 1970.09 nm | 1.69682 @Wavelength 1970.09 nm |
| 1.70487 @Wavelength 1529.58 nm | 1.70487 @Wavelength 1529.58 nm |
| 1.71175 @Wavelength 1128.64 nm | 1.71175 @Wavelength 1128.64 nm |
| 1.71397 @Wavelength 1013.98 nm | 1.71397 @Wavelength 1013.98 nm |
| 1.71779 @Wavelength 852.11 nm | 1.71779 @Wavelength 852.11 nm |
| 1.72038 @Wavelength 768.19 nm | 1.72038 @Wavelength 768.19 nm |
| 1.72273 @Wavelength 706.52 nm | 1.72273 @Wavelength 706.52 nm |
| 1.72506 @Wavelength 656.27 nm | 1.72506 @Wavelength 656.27 nm |
| 1.72571 @Wavelength 643.85 nm | 1.72571 @Wavelength 643.85 nm |
| 1.72632 @Wavelength 632.8 nm | 1.72632 @Wavelength 632.8 nm |
| 1.72904 @Wavelength 589.29 nm | 1.72904 @Wavelength 589.29 nm |
| 1.72916 @Wavelength 587.56 nm | 1.72916 @Wavelength 587.56 nm |
| 1.73237 @Wavelength 546.07 nm | 1.73237 @Wavelength 546.07 nm |
| 1.73854 @Wavelength 486.13 nm | 1.73854 @Wavelength 486.13 nm |
| 1.73931 @Wavelength 479.99 nm | 1.73931 @Wavelength 479.99 nm |
| 1.74491 @Wavelength 441.57 nm | 1.74491 @Wavelength 441.57 nm |
| 1.74588 @Wavelength 435.835 nm | 1.74588 @Wavelength 435.835 nm |
| 1.75199 @Wavelength 404.656 nm | 1.75199 @Wavelength 404.656 nm |
| 1.76243 @Wavelength 365.015 nm | 1.76243 @Wavelength 365.015 nm |
Abbe Number | 53.87 | 53.87 |
| 54.09 | 54.09 |
Optical Dispersion | 0.004099 | 0.004099 |
| 0.004686 | 0.004686 |
| 0.006108 | 0.006108 |
| 0.00666 | 0.00666 |
| 0.006936 | 0.006936 |
| 0.007312 | 0.007312 |
| 0.007344 | 0.007344 |
| 0.011088 | 0.011088 |
| 0.01174 | 0.01174 |
| 0.01348 | 0.01348 |
| 0.013596 | 0.013596 |
| 0.016544 | 0.016544 |
| 0.016725 | 0.016725 |
| 0.02312 | 0.02312 |
Transmission, Visible | 98 % @Thickness 10.0 mm, Wavelength 380 nm | 98 % @Thickness 0.394 in, Wavelength 380 nm |
| 98.6 % @Thickness 10.0 mm, Wavelength 390 nm | 98.6 % @Thickness 0.394 in, Wavelength 390 nm |
| 99 % @Thickness 10.0 mm, Wavelength 400 nm | 99 % @Thickness 0.394 in, Wavelength 400 nm |
| 99.3 % @Thickness 10.0 mm, Wavelength 420 nm | 99.3 % @Thickness 0.394 in, Wavelength 420 nm |
| 99.5 % @Thickness 10.0 mm, Wavelength 440 nm | 99.5 % @Thickness 0.394 in, Wavelength 440 nm |
| 99.7 % @Thickness 10.0 mm, Wavelength 460 nm | 99.7 % @Thickness 0.394 in, Wavelength 460 nm |
| 99.8 % @Thickness 10.0 mm, Wavelength 480 nm | 99.8 % @Thickness 0.394 in, Wavelength 480 nm |
| 99.9 % @Thickness 10.0 mm, Wavelength 500 nm | 99.9 % @Thickness 0.394 in, Wavelength 500 nm |
| 99.9 % @Thickness 10.0 mm, Wavelength 550 nm | 99.9 % @Thickness 0.394 in, Wavelength 550 nm |
| 99.9 % @Thickness 10.0 mm, Wavelength 600 nm | 99.9 % @Thickness 0.394 in, Wavelength 600 nm |
| 99.9 % @Thickness 10.0 mm, Wavelength 650 nm | 99.9 % @Thickness 0.394 in, Wavelength 650 nm |
| 99.9 % @Thickness 10.0 mm, Wavelength 700 nm | 99.9 % @Thickness 0.394 in, Wavelength 700 nm |
IR Transmittance | 58 % @Thickness 10.0 mm, Wavelength 2400 nm | 58 % @Thickness 0.394 in, Wavelength 2400 nm |
| 85 % @Thickness 10.0 mm, Wavelength 2200 nm | 85 % @Thickness 0.394 in, Wavelength 2200 nm |
| 95.1 % @Thickness 10.0 mm, Wavelength 2000 nm | 95.1 % @Thickness 0.394 in, Wavelength 2000 nm |
| 98.1 % @Thickness 10.0 mm, Wavelength 1800 nm | 98.1 % @Thickness 0.394 in, Wavelength 1800 nm |
| 99.3 % @Thickness 10.0 mm, Wavelength 1400 nm | 99.3 % @Thickness 0.394 in, Wavelength 1400 nm |
| 99.3 % @Thickness 10.0 mm, Wavelength 1600 nm | 99.3 % @Thickness 0.394 in, Wavelength 1600 nm |
| 99.9 % @Thickness 10.0 mm, Wavelength 800 nm | 99.9 % @Thickness 0.394 in, Wavelength 800 nm |
| 99.9 % @Thickness 10.0 mm, Wavelength 900 nm | 99.9 % @Thickness 0.394 in, Wavelength 900 nm |
| 99.9 % @Thickness 10.0 mm, Wavelength 1000 nm | 99.9 % @Thickness 0.394 in, Wavelength 1000 nm |
| 99.9 % @Thickness 10.0 mm, Wavelength 1200 nm | 99.9 % @Thickness 0.394 in, Wavelength 1200 nm |
UV Transmittance | 29 % @Thickness 10.0 mm, Wavelength 280 nm | 29 % @Thickness 0.394 in, Wavelength 280 nm |
| 43 % @Thickness 10.0 mm, Wavelength 290 nm | 43 % @Thickness 0.394 in, Wavelength 290 nm |
| 55 % @Thickness 10.0 mm, Wavelength 300 nm | 55 % @Thickness 0.394 in, Wavelength 300 nm |
| 66 % @Thickness 10.0 mm, Wavelength 310 nm | 66 % @Thickness 0.394 in, Wavelength 310 nm |
| 75 % @Thickness 10.0 mm, Wavelength 320 nm | 75 % @Thickness 0.394 in, Wavelength 320 nm |
| 82 % @Thickness 10.0 mm, Wavelength 330 nm | 82 % @Thickness 0.394 in, Wavelength 330 nm |
| 88 % @Thickness 10.0 mm, Wavelength 340 nm | 88 % @Thickness 0.394 in, Wavelength 340 nm |
| 92.5 % @Thickness 10.0 mm, Wavelength 350 nm | 92.5 % @Thickness 0.394 in, Wavelength 350 nm |
| 95.3 % @Thickness 10.0 mm, Wavelength 360 nm | 95.3 % @Thickness 0.394 in, Wavelength 360 nm |
| 97 % @Thickness 10.0 mm, Wavelength 370 nm | 97 % @Thickness 0.394 in, Wavelength 370 nm |
|
Descriptive Properties |
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Acid Resistance, Powder Method, RA(P) | 4 |
CCI | 0.00 B |
| 0.21 G |
| 0.21 R |
coloring, λ 80 | 355 |
Coloring, Internal Transmission λ 0.80 | 327 |
Knoop Hardness Class | 7 |
Ohara Code d | 729541 |
Ohara Code e | 732539 |
Phosphate Resistance, PR | 2 |
Photoelastic Constant (ß) | 1.61 |
Water Resistance, RW(P) | 1 |
Weathering Resistance (Surface Method) W(S)max | 3 |
Yield Point, At (°C) | 672 |