gadolinium diphosphate | 74174-54-2

• 英文名称: gadolinium diphosphate
• CAS: 74174-54-2
• 化学式: Gd*HO₇P₂
• 分子量: 332.201
• InChiKey: AZRBPAPYKNCHQS-UHFFFAOYSA-K

反应信息

• 作为反应物：
  描述：

  gadolinium diphosphate 以 neat (no solvent) 为溶剂， 生成 gadolinium diphosphate
  参考文献：
  名称：

  Characterization and thermal behavior of HGdP2O7·3H2O

  摘要：

  Crystals of the trihydrated gadolinium diphosphate HGdP2O7. 3H(2)O were obtained from a mixture of diphosphoric acid and gadolinium nitrate solutions. This salt was characterized by X-ray powder diffraction, IR spectroscopy and thermal analysis. IR spectroscopic study reveals the existence of the characteristic band of the P2O7 group, the v(as)(POP) band, at 941 cm(-1) and the absence of the v(s)(POP) one. The thermal decomposition of HGdP2O7. 3H(2)O, which was followed by thermogravimetry and differential scanning calorimetry, shows that the elimination of the crystallization water takes place in three stages between 71 and 500 degreesC. The overall DeltaH of the first two dehydration were found to be 41.06 and 25.88 kJ/mol. New well-crystallized hydrates HGdP2O7.1.5H(2)O and HGdP2O7.0.5H(2)O were obtained through heating HGdP2O7. 3H(2)O, respectively, at 145 and 280 degreesC. The anhydrous HGdP2O7 salt, which was obtained by calcination of HGdP2O7. 3H(2)O at 530 degreesC, decomposes at 700 degreesC with loss Of P2O5 to give the gadolinium diphosphate Gd-4(P2O7)(3). (C) 2001 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0025-5408(01)00689-4
• 作为产物：
  描述：

  gadolinium diphosphate trihydrate 以 neat (no solvent) 为溶剂， 生成 gadolinium diphosphate
  参考文献：
  名称：

  Constant transformation rate thermal analysis of HGdP2O7·3H2O

  摘要：

  The aim of this work is the optimization of the preparation of anhydrous gadolinium hydrogen phosphate with good fluorescence properties. The products obtained by dehydration of gadolinium hydrogen phosphate trihydrate depend on the conditions chosen for the thermal treatment. For this reason, the dehydration was followed by Constant Rate Thermal Analysis whilst strictly controlling the water vapour pressure above the sample. Intermediate samples, obtained during dehydration were characterised by IR spectroscopy and X-ray diffraction. It has thus been shown that the thermal pathway taken for the dehydration depends on the water vapour pressure above the sample in the region from 10-2to 5 mbar. Under the lowest water vapour pressure (5·10-3mbar), the elimination of the crystallization water is carried out in a continuous way and produces a quasi-amorphous intermediate. Under higher water vapour pressure (5 mbar), well crystallized intermediate products are obtained. The results obtained suggest that the trihydrate contains zeolitic water which confirms a prior structural study.

  DOI：

  10.1007/s10973-005-0964-3

文献信息

• Synthesis, Crystal Structure and Thermal Decomposition of [HGdP₂O₇ · 2 H₂O] · NH₃ Electric properties of HGdP₂O₇ and Gd₂P₄O₁₃
  作者：R. Zrelli-Annabi、F. Chehimi-Moumen、H. Moutaabbid、O. Kurakevych、Y. Le Godec、D. Ben Hassen-Chehimi、M Trabelsi-Ayadi

  DOI：10.1080/10426507.2017.1415898

  日期：2019.2.1

  water molecule in the studied material. The thermal decomposition of [HGdP2O7 · 2 H2O] · NH3, as investigated by Controlled Rate Thermal Analysis, took place in three stages between -23 and 600 °C leading to the anhydrous salt HGdP2O7. The calcination of the synthesized product at 850 °C in a static air furnace allowed us to obtain the tetraphosphate Gd2P4O13. X-ray powder diffraction and infrared spectroscopy

  摘要 通过水溶液蒸发的软化学途径合成了一种新的二磷酸钆[HGdP2O7 · 2 H2O] · NH3。它在 Z = 2 和以下晶胞尺寸的空间群 Pī 中结晶：a = 6.4609(2), b = 6.9810(2), c = 9.813(4) Ǻ, α = 81.345(3), β = 80.547 (3), γ = 88.430(3)°。红外光谱证实了 P-OH 基团的存在，以及研究材料中的氨和水分子。[HGdP2O7 · 2 H2O] · NH3 的热分解，如受控速率热分析所研究的，发生在 -23 到 600 °C 之间的三个阶段，导致无水盐 HGdP2O7。合成产物在 850 °C 的静态空气炉中煅烧，使我们能够获得四磷酸 Gd2P4O13。X 射线粉末衍射和红外光谱用于鉴定这些材料。通过阻抗复分析研究了HGdP2O7和Gd2P4O13的电性能。在相对中等的温度范围内，在这两种材料中都观察到了适度的电导率。0