H in Ussingite

•  Johnson EA, Rossman GR (2004) An infrared and ¹H MAS NMR investigation of strong hydrogen bonding in ussingite, Na₂AlSi₃O₈(OH). Physics and Chemistry of Minerals 31, 115-121.

• Balan E, Refson K, Blanchard M, Delattre S, Lazzeri M, Ingrin J, Mauri F, Wright K, Winkler B (2008)  Theoretical infrared absorption coefficient of OH groups in minerals. American Mineralogist 93, 950-953

• Williams ER, Weller MT (2012) A variable-temperature neutron diffraction study of ussingite; a strong asymmetric hydrogen bond in an aluminosilicate framework. Physics and Chemistry of Minerals 39, 471-478.