Memo re HófvarpnirHCON: A Physics-Based Framework for Crystal Density Estimation from Molecular Structure

This memo documents the development of a crystal-density estimation framework based on voxelisedmolecular volume and a deterministic packing-coefficient model.The method estimates crystal density directly from molecular structure without requiring experimentallydetermined crystal structures, crystal structure prediction, or machine-learning models.This memo serves as a time-stamped public disclosure of the conceptual framework and itsimplementation direction. Detailed validation, benchmarking, and performance analysis will bepresented in a forthcoming preprint and journal publication.