We report the synthesis of single crystals of ${\mathrm{Ce}}_2{\mathrm{SnS}}_5$ through a two-stage chemical vapor transport method. The ${\mathrm{Ce}}_2{\mathrm{SnS}}_5$ system is a member of the orthorhombic Pbam (No. 55) space group and realizes a distorted trigonal tricapped prism (TTP) crystal field around each cerium site. We characterized the sample through orientation-dependent magnetization and heat capacity measurements to probe the magnetic anisotropy in the system characteristic of XY-like anisotropic Heisenberg model behavior. ${\mathrm{Ce}}_2{\mathrm{SnS}}_5$ furthermore enters a zero-field ordered phase under $T_N=2.4\text{K}$; powder neutron diffraction measurements reveal incommensurate magnetic order near $T_N$. The system then locks into a commensurate, two-$q$ magnetic structure below approximately $1.2\text{K}$. This commensurate structure belongs to the Shubnikov group $P{b}^{\prime }{a}^{\prime }{m}^{\prime }\left(\mathrm{MSG}55.359\right)$ and realizes the propagation vectors $\vec{q}=(1/3,0,0)$ and $\vec{q}=(0,0,0)$.

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• Antiferromagnetism
• Magnetic anisotropy
• Magnetism
• Phase diagrams
• Lanthanides
• Neutron scattering