Abstract—

Single-phase LuGaTi₂O₇ samples have been prepared by solid-state reaction in a starting mixture of Lu₂O₃, Ga₂O₃, and TiO₂ via sequential firing in air at temperatures of 1273 and 1573 K. The crystal structure of the lutetium gallium dititanate has been determined by the Rietveld method (profile analysis of X-ray diffraction patterns of polycrystalline powders): sp. gr. Pcnb; a = 9.75033(13) Å, b = 13.41425(17) Å, c = 7.29215(9) Å, V = 957.32(2) ų, d = 6.28 g/cm³. The heat capacity of LuGaTi₂O₇ has been determined as a function of temperature by differential scanning calorimetry in the range 320–1000 K. The C_p(T) data thus obtained have been used to calculate the principal thermodynamic functions of the oxide compound.

中文翻译：

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LuGaTi 2 O 7的合成，晶体结构和热力学性质

摘要-

通过在1273和1573 K的温度下在空气中依次烧制，在Lu ₂ O ₃，Ga ₂ O ₃和TiO ₂的起始混合物中通过固态反应制备单相LuGaTi ₂ O ₇样品。通过Rietveld方法（多晶粉末的X射线衍射图谱分析）确定了二钛酸lut镓的含量。gr。Pcnb ; 一个= 9.75033（13）埃，b = 13.41425（17）埃，c ^ = 7.29215（9）埃，V = 957.32（2）埃³，d = 6.28Hz克/厘米³。通过差示扫描量热法确定了LuGaTi ₂ O ₇的热容随温度的变化，范围为320–1000K。由此获得的C _p（T）数据已用于计算氧化物的主要热力学函数。 。