H positions in leucophoenicite, Mn7Si3O12(OH)2: A close relative of the hydrous B phases Welch, Mark D. ; Marshall, William G. ; Ross, Nancy L. ; Knight, Kevin S. Abstract Publication: American Mineralogist Pub Date: January 2002 DOI: 10.2138/am-2002-0116 Bibcode: 2002AmMin..87..154W