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Growth Twinning in Self-Frequency-Doubling Laser Crystal NdxGd1 xAl3 (BO3) 4 Observed with White-Beam Synchrotron Radiation Topography
phys. stat. sol. (a) 170, 29 (1998),-0001,():
The growth twinning in self-frequency-doubling laser crystal NdxGd1 xAl3 (BO3) 4 (NGAB) has been observed with white-beam synchrotron radiation topography (WBSRT). It is shown that the growth twinning in flux-grown NGAB crystal is the 180 rotation twin in which the twofold symmetric operation axis is parallel to the [0001] direction and this kind of twinning often shows the black-and-white contrast in X-ray topography. It is believed that the growth twinning in NGAB was induced by growth bands formed during crystal growth.
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