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Aiming at tailoring optical properties, the precipitation of LaF 3 nano-crystals in LaF 3 –Na 2 O–Al 2 O 3 –SiO 2 glass-ceramics is studied thoroughly on the nano-scale using advanced transmission electron microscopic techniques. Nano-sized phase-separation droplets enriched in lanthanum and silicon are formed already in the base glass. Within these...
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