Media type: E-Article Title: Infrared activity in elemental crystals Contributor: Zallen, Richard; Martin, Richard M.; Natoli, Vincent imprint: American Physical Society (APS), 1994 Published in: Physical Review B Language: English DOI: 10.1103/physrevb.49.7032 ISSN: 0163-1829; 1095-3795 Origination: Footnote: