10.1021/acs.inorgchem.9b00350.s001 Justin B. Felder Justin B. Felder Ashley Weiland Ashley Weiland Halyna Hodovanets Halyna Hodovanets Gregory T. McCandless Gregory T. McCandless Tania G. Estrada Tania G. Estrada Thomas J. Martin Thomas J. Martin Amy V. Walker Amy V. Walker Johnpierre Paglione Johnpierre Paglione Julia Y. Chan Julia Y. Chan Law and Disorder: Special Stacking UnitsBuilding the Intergrowth Ce<sub>6</sub>Co<sub>5</sub>Ge<sub>16</sub> American Chemical Society 2019 Ce cuboctahedra composition Ce 6 Co 5 Ge 16 BaNiSn 3 structure types quantum materials Å. X-ray diffraction structure type Ce 6 Co 5 Ge 16 Intergrowth Ce 6 Co 5 Ge 16 Sn flux AuCu 3 transport properties Sn-stabilized structure Ce 6 Co 5 Ge 16 crystallizes AlB 2 space group Cmcm anisotropic lattice parameters 2019-04-22 19:39:06 Journal contribution https://acs.figshare.com/articles/journal_contribution/Law_and_Disorder_Special_Stacking_Units_Building_the_Intergrowth_Ce_sub_6_sub_Co_sub_5_sub_Ge_sub_16_sub_/8023607 A new structure type of composition Ce<sub>6</sub>Co<sub>5</sub>Ge<sub>16</sub> was grown out of a molten Sn flux. Ce<sub>6</sub>Co<sub>5</sub>Ge<sub>16</sub> crystallizes in the orthorhombic space group <i>Cmcm</i>, with highly anisotropic lattice parameters of <i>a</i> = 4.3293(5) Å, <i>b</i> = 55.438(8) Å, and <i>c</i> = 4.3104(4) Å. The resulting single crystals were characterized by X-ray diffraction, and the magnetic and transport properties are presented. The Sn-stabilized structure of Ce<sub>6</sub>Co<sub>5</sub>Ge<sub>16</sub> is based on the stacking of disordered Ce cuboctahedra and is an intergrowth of existing structure types including AlB<sub>2</sub>, BaNiSn<sub>3</sub>, and AuCu<sub>3</sub>. The stacking of structural subunits has previously been shown to be significant in the fields of superconductivity, quantum materials, and optical materials. Herein, we present the synthesis, characterization, and complex magnetic behavior of Ce<sub>6</sub>Co<sub>5</sub>Ge<sub>16</sub> at low temperature, including three distinct magnetic transitions.