The anisotropic thermal expansion of LiB 3 O 5 has been studied along the principal crystallographic directions over the temperature range of 17 to 790 degrees C by means of high-temperature X-ray powder diffraction. This orthorhombic crystal exhibits strongly anisotropic expansion with coefficients of 108.2*10 -6 K -1 for (100), 33.6*10 -6 K -1 for (010) and -88.0*10 -6 K -1 for (001) at 50 degrees C. The coefficients tend to zero when the temperature approaches the crystal's peritectic reaction point.
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Wei et al. (1990) studied this question.
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