Assertion: rhombic dodecahedron | /r/AtLocation | nature
Facets:
value: as a crystalline form
type: MANNER
Source sentences:
text: This dodecahedron is probably best referred to as Kepler's rhombic dodecahedron, being first formally described by Johannes Kepler, although it exists in nature as a crystalline form, and the cells of the honeycomb are also rhombic dodecahedra of this type.