Abstract The compound Mn2[VO4]F was synthesized using a hydrothermal synthesis route at low temperature and its crystal structure was determined from single crystal X-ray diffraction data. Mn2[VO4]F was characterized by magnetic susceptibility and specific heat capacity measurements. Mn2[VO4]F crystallizes with the triplite-type structure, space group C2/c, a = 13.451(3) Å, b = 6.6953(16) Å, c = 10.126(3) Å, β = 116.587(4)°, V = 815.6(3) Å3 and Z = 8. The structure consists of a 3D-framework built up of VO4 tetrahedra, and manganese (II) polyhedra which form chains running along the [101] and [010] directions. The coordination of the manganese cations and the connectivity between the manganese polyhedra are not defined clearly due to the disorder of the fluoride anions which form zigzag chains along [001]. The magnetic susceptibility follows a Curie–Weiss behavior above 50 K with Θ = −88 K indicating that predominant magnetic interactions are antiferromagnetic. The specific heat capacity and magnetization measurements show that Mn2[VO4]F undergoes a three-dimensional magnetic ordering at TN = 30 K and a canted weak ferromagnetism due to mixed-anion effect.

中文翻译：

---

Mn 2 [VO 4 ]F的低温合成、结构和磁性能

摘要 采用低温水热合成法合成了Mn2[VO4]F化合物，利用单晶X射线衍射数据确定了其晶体结构。Mn2[VO4]F 的特点是磁化率和比热容测量。Mn2[VO4]F 结晶为三重体型结构，空间群 C2/c，a = 13.451(3) Å，b = 6.6953(16) Å，c = 10.126(3) Å，β = 116.587(4)° , V = 815.6(3) Å3 和 Z = 8。该结构由 VO4 四面体和锰 (II) 多面体构成的 3D 框架组成，它们形成沿 [101] 和 [010] 方向运行的链。由于沿[001]形成锯齿链的氟阴离子无序，锰阳离子的配位和锰多面体之间的连接性没有明确定义。磁化率在 50 K 以上遵循居里-魏斯行为，其中 Θ = -88 K，表明主要的磁相互作用是反铁磁性的。比热容和磁化强度测量表明，Mn2[VO4]F 在 TN = 30 K 时经历三维磁有序，并且由于混合阴离子效应而具有倾斜的弱铁磁性。