Single crystals of LaCr(BO) were synthesized through spontaneous nucleation from a KMoO flux melt. The crystal structure was determined using single-crystal X-ray diffraction (XRD) at temperatures of 293 K and 85 K. LaCr-borate crystallizes in the monoclinic 2 space group with unit cell parameters = 7.47980(5) Å, = 9.55180(7) Å, = 11.48330(8) Å, = 104.0060(6)°, V = 796.04(1) Å (for C1, = 293 K), and = 7.47380(5) Å, = 9.55520(7) Å, = 11.47100(8) Å, = 103.9330(6)°, V = 795.08(1) Å (for C2, = 85 K), each with Z = 4. The temperature dependence of the unit cell parameters, including the monoclinic angle () and the unit cell volume (V), was investigated over the range of 85–293 K. No structural phase transitions were observed in the low-temperature region down to 85 K. Differential scanning calorimetry (DSC) measurements revealed no high-temperature phase transitions between 50 and 1350°C. Infrared (IR) spectroscopy confirmed the monoclinic structure of LaCr(BO) crystals, revealing characteristic absorption bands, including the lowest frequency mode associated with the translational vibrations of the La ion.

中文翻译：

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单斜硼酸镧铬LaCr3(BO3)4的合成、结构及磁性能


LaCr(BO)单晶是通过 KMoO 熔体熔体自发成核合成的。使用单晶 X 射线衍射 (XRD) 在 293K 和 85K 温度下确定晶体结构，LaCr-硼酸盐在单斜 2 空间群中结晶，晶胞参数 = 7.47980(5) Å, = 9.55180(7)。 ) Å, = 11.48330(8) Å, = 104.0060(6)°, V = 796.04(1) Å (对于 C1, = 293K), 且 = 7.47380(5) Å, = 9.55520(7) Å, = 11.47100 (8) Å, = 103.9330(6)°，V = 795.08(1) Å（对于 C2，= 85K），每个 Z = 4。晶胞参数的温度依赖性，包括单斜角 () 和在 85-293K 的范围内研究了晶胞体积 (V)，在低至 85K 的低温区域中没有观察到结构相变。 50 至 1350°C 之间。红外 (IR) 光谱证实了 LaCr(BO) 晶体的单斜结构，揭示了特征吸收带，包括与 La 离子平移振动相关的最低频率模式。