Raman spectra and X-ray diffraction patterns of Mg₂P₂O₇ polymorphs (α- and β-phase) were investigated at various temperatures up to 1073 K at ambient pressure. Typical Raman spectra and X-ray diffraction patterns were observed for the reversible phase transition between low-temperature α-Mg₂P₂O₇ and high- temperature β-Mg₂P₂O₇ during heating and cooling. The effect of temperature on the Raman vibrations for the two Mg₂P₂O₇ polymorphs was quantitatively analyzed. All the observed Raman active bands of the two Mg₂P₂O₇ polymorphs showed linear temperature dependence with different slopes. The quantitative temperature dependences of the Raman bands are −4.01 × 10⁻² ∼ 1.94 × 10⁻² and −2.31 × 10⁻² ∼ -0.44 × 10⁻² cm⁻¹ K⁻¹ for α- and β-Mg₂P₂O₇, respectively. The force constant evolution of [P₂O₇]⁴⁻ stretching vibrations and the temperature derivatives for both α- and β-Mg₂P₂O₇ were also determined. The thermal expansion coefficient of β-Mg₂P₂O₇ was estimated at 2.97(8) × 10⁻⁵ K⁻¹. Hence the isobaric mode Grüneisen parameters of β-Mg₂P₂O₇ were calculated.

_{在环境压力下，在高达 1073 K 的各种温度下研究了 Mg 2} P ₂ O ₇多晶型物（α-和 β-相）的拉曼光谱和 X 射线衍射图。在加热和冷却过程中，观察到低温 α-Mg ₂ P ₂ O ₇和高温 β-Mg ₂ P ₂ O _{7之间的可逆相变的典型拉曼光谱和 X 射线衍射图。}定量分析了温度对两种Mg ₂ P ₂ O _{7多晶型物的拉曼振动的影响。两个 Mg 2}的所有观察到的拉曼活性谱带P ₂ O ₇多晶型物显示出具有不同斜率的线性温度依赖性。对于α-和β-Mg ₂ P ，拉曼谱带的定量温度依赖性为-4.01 × 10 ^-2  ∼ 1.94 × 10 ^-2和-2.31 × 10 ^-2  ∼ -0.44 × 10 ^-2 cm ^-1 K ^-1 ₂ O ₇，分别。_{[P 2} O ₇ ] ⁴⁻伸缩振动的力常数演化和 α- 和 β-Mg ₂ P ₂ O _{7的温度导数}也被确定了。_{β-Mg 2} P ₂ O ₇的热膨胀系数估计为2.97(8) × 10 ^-5 K ^-1。_{因此计算了β-Mg 2} P ₂ O ₇的等压模式Grüneisen 参数。