2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198496We calculate spin-dependent cross sections for the scattering from mica of hypothetical weakly interacting dark-matter particles such as neutralinos. The most abundant odd-A isotopes in mica, Al27 and K39, require different shell-model treatments. The calculated cross sections will allow the interpretation of ongoing experiments that look for tracks due to the interaction of dark-matter particles with nuclei in ancient mica.11 pages, RevTex, 2 uuencoded figures, submittted to Phys. Rev. DHigh Energy Physics - PhenomenologyAstrophysicsNuclear Theorytext