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Crystal Research and Technology |
Cryst. Res. Technol. 40,
26 (2005) - Abstract -
Growth and characterization of LiCaGaF6
E. Sani, M. Rabe*, G. Reck**, P. Becker***, M. Roßberg*, R. Bertram*, and D. Klimm*
Università di Pisa, Dipartimento di fisica, via Buonarroti 2, 56127 Pisa, Italy
*Institut für Kristallzüchtung, Max-Born-Str. 2, 12489 Berlin, Germany
**Bundesanstalt für Materialforschung und -prüfung, Richard-Willstätter-Str. 11, 12489 Berlin, Germany
***Universität zu Köln, Institut für Kristallographie, Zülpicher Str. 49 b, 50674 Köln, Germany
| Keywords | laser crystals, fluorides, hydrolysis, phase diagram |
| PACS | 42.55.Rz, 81.30.Dz, 81.10.–h |
| DOI | 10.1002/crat.200410304 |
Optically clear LiCaGaF6 (LiCGaF) single crystals up to 15 mm length were grown by the Czochralski method from CaF2 deficient melts. The substance melts incongruently at 751°C. No significant deviations of the crystal composition from the nominal stoichiometry Li:Ca:Ga=1:1:1 could be found. X-ray structure analysis revealed that the substance crystallizes in the colquiriite type structure. LiCaGaF6 is transparent for optical wavelengths >140 – 150 nm. The thermal expansion of the trigonal crystals is α11 = α22 = 18.7x10-6 K-1 perpendicular [001] and α33 = 2.7x10-6 K-1 parallel [001].
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