AI Article Synopsis
- The low-temperature phase of Sr(OCN), known as α-SCY, has been prepared and identified, differentiating it from the high-temperature phase called β-SCY, which is known for its frequency-doubling properties.
- Both phases crystallize in noncentrosymmetric structures, with α-SCY having a lower symmetry (Cc) than β-SCY (R3c), and their atomic positions exhibit minor differences.
- The phase transition between α-SCY and β-SCY was investigated using temperature-dependent powder X-ray diffraction, and their nonlinear optical (NLO) properties were compared to the well-known material KTiOPO (KTP).
Article Abstract
The low-temperature modification of Sr(OCN) was prepared and assigned as α-SCY after the high-temperature phase (now called β-SCY) and its frequency-doubling properties were reported recently. The crystal structure of α-SCY was solved and refined by single-crystal X-ray diffraction. Both modifications of SCY crystallize in noncentrosymmetric space groups, with the low-temperature phase (α-SCY) adopting the lower symmetry structure (Cc). Atomic positions in α-SCY (Cc) reveal only small deviations in comparison to those in the structure of β-SCY (R3c). The reversible phase transition between both modifications of SCY was studied by means of temperature-dependent powder X-ray diffraction. NLO measurements of both SCY modifications are reported in comparison to the commercial frequency-doubling material KTiOPO (KTP).
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| http://dx.doi.org/10.1021/acs.inorgchem.6b02893 | DOI Listing |
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