| Data still to be completed------(<---links) | |
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| PRODUCT DATA of FK51 | 
| Material | FK51 | 
| Product Datasheet | FK51A | 
| Chemical Composition | Calcium Fluoride | 
| Name of Manufacturer | SCHOTT AG Hattenbergstrasse 10, 55122 Mainz, Germany +49 (0)6131/66-1812 +49 (0)3641/2888-9047 info.optics@schott.com www.schott.com/advanced_optics OHARA GmbH www.oharacorp.com Nordring 30A 65719 Hofheim a, Ts, Germany 06192-9650-50 06192-9650-51 www.ohara-gmbh.com | 
| PHYSICAL PROPERTIES | 
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| Specific Gravity | 3.73 | 
| THERMAL PROPERTIES | 
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| Thermal Expansion Coefficient | 13.3 μstrain/°C |