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Phase Equilibria and Crystal Growth for LiREF4 Scheelite Laser Crystals

Published online by Cambridge University Press:  01 February 2011

Detlef Klimm,
Ivanildo A. Dos Santos,
Izilda M. Ranieri and
Sonia L. Baldochi
Detlef Klimm
Affiliation:
klimm@ikz-berlin.de, Leibniz Institute for Crystal Growth, Berlin, Germany
Ivanildo A. Dos Santos
Affiliation:
iasantosif@yahoo.com.br, IPEN, Center for Lasers and Applications, Sao Paulo, Brazil
Izilda M. Ranieri
Affiliation:
iranieri@ipen.br, IPEN, Center for Lasers and Applications, Sao Paulo, Brazil
Sonia L. Baldochi
Affiliation:
baldochi@ipen.br, IPEN, Center for Lasers and Applications, Sao Paulo, Brazil
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Abstract

The scheelite type laser crystals LiREF4 melt congruently only for RE being one of the elements Er, Tm, Yb, Lu, or possibly Y, respectively. For RE = Eu, Gd, Tb, Dy, or Ho the corresponding scheelites undergo a peritectic melting under the formation of the corresponding rare earth fluoride. The melting behavior of LiREF4 mixed crystals with two or more RE is not yet known well. If RE is a mixture of Gd and Lu, Gd rich solid solutions melt peritectically under formation of (Gd,Lu)F3 and Lu rich solid solutions melt directly without formation of other solid phases.

Keywords

crystal growthdifferential thermal analysis (DTA)phase equilibria

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