Maclean, J., Hatton, P., Crain, J., Piltz, R., & Clark, S. (1996, December). Structural refinement and stability of silicon XII. Presented at EUROPEAN POWDER DIFFRACTION: EPDIC IV, PTS 1 AND 2 Philips Anal X Ray; CLRC Daresbury Lab, BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLAND