Department of Chemistry, Northwestern University, Evanston, Illinois, 60208-3113, USA.
Inorg Chem. 2011 Feb 7;50(3):1084-8. doi: 10.1021/ic101915x. Epub 2010 Dec 28.
Black prisms of Np(3)Q(5) (Q = S, Se) have been synthesized by the stoichiometric reactions between Np and Q at 1173 K in a CsCl flux. The structures of these compounds were characterized by single-crystal X-ray diffraction methods. The Np(3)Q(5) compounds are isostructural with U(3)Q(5). The structure of Np(3)Q(5) is constructed from layers of Np(1)Q(8) distorted bicapped trigonal prisms that share faces with each other on bc planes. Each Np(1)Q(8) layer further shares Q(2) edges with two adjacent identical neighbors to form a three-dimensional framework. The space inside each channel within this framework is filled by one single edge-sharing Np(2)Q(7) distorted 7-octahedron chain running along the b axis. Magnetic susceptibility measurements show that Np(3)S(5) and Np(3)Se(5) have antiferromagnetic orderings at 35(1) and 36(1) K, respectively. Above the magnetic ordering temperatures, both Np(3)S(5) and Np(3)Se(5) behave as typical Curie-Weiss paramagnets. The effective moments obtained from the fit of the magnetic data to a modified Curie-Weiss law over the temperature range 70 to 300 K are 2.7(2) μ(B) (Np(3)S(5)) and 2.9(2) μ(B) (Np(3)Se(5)).
黑磷的 Np(3)Q(5)（Q = S、Se）已通过 Np 和 Q 在 1173 K 的 CsCl 通量中的化学计量反应合成。这些化合物的结构通过单晶 X 射线衍射方法进行了表征。这些 Np(3)Q(5)化合物与 U(3)Q(5)具有同构性。Np(3)Q(5)的结构由层状的 Np(1)Q(8)扭曲双帽三角棱柱组成，这些棱柱在 bc 平面上相互共享面。每个 Np(1)Q(8)层进一步通过 Q(2)边缘与两个相邻的相同邻居共享，以形成一个三维框架。该框架内每个通道内的空间被沿 b 轴运行的单个边缘共享 Np(2)Q(7)扭曲 7-八面体链填充。磁化率测量表明，Np(3)S(5)和 Np(3)Se(5)分别在 35(1)和 36(1) K 处具有反铁磁有序。在磁有序温度以上，Np(3)S(5)和 Np(3)Se(5)都表现为典型的居里-外斯顺磁体。通过将磁数据拟合到居里-外斯定律，在 70 至 300 K 的温度范围内获得的有效磁矩分别为 2.7(2)μB（Np(3)S(5)）和 2.9(2)μB（Np(3)Se(5)）。
