The crystallography of the Ca2SiO4-Ca3P2O8 solid solutions in the dephosphorization slag in current steelmaking process was determined in this study. Understanding the physical and chemical properties of these Ca2SiO4-Ca3P2O8 solid solutions is a preliminary step towards understanding the role of the Ca2SiO4-Ca3P2O8 solid solutions in the dephosphorization process. The range of Ca3P2O8 in the Ca2SiO4-Ca3P2O8 solid solutions synthesized for analysis varied from 10 to 90 mol pct, with an incremental increase of 10 mol pct per solid solution. In solid solutions with a Ca3P2O8 content of up to 40 mol pct, the crystal structure at 1773 K was found to be hexagonal, while the solid solutions with a Ca3P2O8 content over 70 mol pct had a trigonal structure. The silicocarnotite solid solutions observed when the Ca3P2O8 content was 50 to 60 mol pct were likely formed by phase transformation during cooling. In the stable solid solution with a Ca3P2O8 content of 50 to 60 mol pct at 1773 K before the occurrence of transformation, the crystal structure is trigonal since it is in the Ca3P2O8-rich range. A linear increase in the lattice parameters c of the solid solutions in the range of (0, 40 mol pct) and (70 mol pct, 100 mol pct) was found with increasing Ca3P2O8 content. The lattice parameter a, however, was almost independent of the Ca3P2O8 content in the solid solutions.

中文翻译：

---

高温 Ca2SiO4-Ca3P2O8 固溶体的晶体学

本研究确定了当前炼钢过程中脱磷渣中Ca2SiO4-Ca3P2O8固溶体的结晶学。了解这些 Ca2SiO4-Ca3P2O8 固溶体的物理和化学性质是了解 Ca2SiO4-Ca3P2O8 固溶体在脱磷过程中的作用的初步步骤。为分析而合成的 Ca2SiO4-Ca3P2O8 固溶体中 Ca3P2O8 的范围从 10 到 90 mol pct，每个固溶体增量增加 10 mol pct。在 Ca3P2O8 含量高达 40 mol pct 的固溶体中，发现在 1773 K 时的晶体结构是六方的，而 Ca3P2O8 含量超过 70 mol pct 的固溶体则具有三角结构。当 Ca3P2O8 含量为 50 至 60 mol pct 时，观察到的硅镁石固溶体可能是通过冷却过程中的相变形成的。在相变发生前，在 1773 K 下 Ca3P2O8 含量为 50 至 60 mol pct 的稳定固溶体中，晶体结构是三角形的，因为它处于富含 Ca3P2O8 的范围内。发现随着 Ca3P2O8 含量的增加，固溶体的晶格参数 c 在 (0, 40 mol pct) 和 (70 mol pct, 100 mol pct) 范围内线性增加。然而，晶格参数 a 几乎与固溶体中 Ca3P2O8 的含量无关。晶体结构是三角形的，因为它在富含 Ca3P2O8 的范围内。发现随着 Ca3P2O8 含量的增加，固溶体的晶格参数 c 在 (0, 40 mol pct) 和 (70 mol pct, 100 mol pct) 范围内线性增加。然而，晶格参数 a 几乎与固溶体中 Ca3P2O8 的含量无关。晶体结构是三角形的，因为它在富含 Ca3P2O8 的范围内。发现随着 Ca3P2O8 含量的增加，固溶体的晶格参数 c 在 (0, 40 mol pct) 和 (70 mol pct, 100 mol pct) 范围内线性增加。然而，晶格参数 a 几乎与固溶体中 Ca3P2O8 的含量无关。