The Schmitt-Conway biprism is a convex polyhedron found to be only aperiodically space-filling by Conway in 1993.
Schmitt-Conway Biprism
See also
Convex Polyhedron, Space-Filling PolyhedronExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Schmitt-Conway Biprism." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Schmitt-ConwayBiprism.html