Magnetic structure of the kagome metal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>YbFe</mml:mi><mml:mn>6</mml:mn></mml:msub><mml:msub><mml:mi>Ge</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math> in

A material in possession of localized <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mn>4</a:mn><a:mi>f</a:mi></a:math>-electron magnetism and delocalized <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mn>3</b:mn><b:mi>d</b:mi></b:math>-electron or band magnetism can often present enigmatic physical phenomena, and there has been a longstanding interest in the kagome metal <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mrow><c:msub><c:mi>YbFe</c:mi><c:mn>6</c:mn></c:msub><c:msub><c:mi>Ge</c:mi><c:mn>6</c:mn></c:msub></c:mrow></c:math>. More recently, because of an investigation of a so-called anomalous Hall effect, or topological Hall effect, and magnetic neutron Bragg diffraction [Yao , ]. Iron moments in the two-dimensional layers of a hexagonal nuclear structure undergo collinear antiferromagnetic order below a temperature <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"><d:mrow><d:mo>≈</d:mo><d:mn>500</d:mn></d:mrow></d:math> K. The moments depart from the <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"><e:mi>c</e:mi></e:math> axis in a spontaneous transition at <f:math xmlns:f="http://www.w3.org/1998/Math/MathML"><f:mrow><f:mo>≈</f:mo><f:mspace width="0.16em"/><f:mn>63</f:mn></f:mrow></f:math> K to an orthorhombic structure. The magnetism of Yb ions appears to behave independently, which can be confirmed using resonant x-ray Bragg diffraction enhanced by a Fe atomic resonance. The inferred magnetic structure is P(parity)T(time)-symmetric (anti-inversion <h:math xmlns:h="http://www.w3.org/1998/Math/MathML"><h:mover><h:mrow><h:mn>1</h:mn><h:msup><h:mrow/><h:mo>′</h:mo></h:msup></h:mrow><h:mo>¯</h:mo></h:mover></h:math>) collinear antiferromagnetism that does not couple to circular polarization (helicity) in primary x-rays, unlike altermagnetism. A linear magnetoelectric effect is allowed, and Kerr rotation and the piezomagnetic effect are forbidden. Symmetry informed Bragg diffraction patterns for future x-ray and neutron experiments are shown to be rich in Fe magnetic properties of orthorhombic <i:math xmlns:i="http://www.w3.org/1998/Math/MathML"><i:mrow><i:msub><i:mi>YbFe</i:mi><i:mn>6</i:mn></i:msub><i:msub><i:mi>Ge</i:mi><i:mn>6</i:mn></i:msub></i:mrow></i:math>, including space-spin correlations, anapoles, and Dirac quadrupoles familiar in high-<j:math xmlns:j="http://www.w3.org/1998/Math/MathML"><j:msub><j:mi mathvariant="normal">T</j:mi><j:mi mathvariant="normal">c</j:mi></j:msub></j:math> ceramic superconductors.