# Pore Geometry Pore-related properties were computed using [Zeo++](http://zeoplusplus.org) 0.3 with the high-accuracy flag (except in the rare cases where this failed, in which case the standard accuracy was used). These properties were computed using the PBE-D3(BJ) optimized structure. The pore-limiting diameter is the smallest spherical diameter of void space that a guest species would need to traverse in order to diffuse through the material, whereas the largest cavity diameter is the largest spherical diameter that can fit within the void space of the material. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.materialsproject.org/apps/explorer-apps/mof-explorer/property-definitions/pore-geometry.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.