Structure of synthetic Na-birnessite: Evidence for a triclinic one-layer unit cell Lanson, Bruno ; Drits, Victor A. ; Feng, Qi ; Manceau, Alain Abstract Publication: American Mineralogist Pub Date: November 2002 DOI: 10.2138/am-2002-11-1215 Bibcode: 2002AmMin..87.1662L