{cquote|The winds of the Future waitAt the iron walls of her Gate,And the western ocean breaks in thunder,And the western stars go slowly under,And her gaze is ever WestIn the dream of her young unrest.Her sea is a voice that calls,And her star a voice above,And her wind a voice on her walls--My cool, grey city of love. } ~ George Sterling, `The .... Found on http://en.wikipedia.org/wiki/Interstitial_site
Octahedral and tetrahedral open spaces within a close-packed arrangement of atoms or ions in which a cation can fit. Found on https://www.encyclo.co.uk/local/20687