Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Surface enthalpy (hydrous surface) versus Mn AOS. Values for sodium birnessite (Na0.09·MnO1.82·0.52H2O) (■), potassium birnessite (K0.21·MnO1.87·0.33H2O) (●), calcium birnessite (Ca0.12·MnO1.81·0.72H2O) (▲), and cryptomelane (K0.11·MnO1.94·0.37H2O) (◄) are from the present work. Samples of Ca–Mn–oxide nanosheets [Ca0.39MnO2.34·0.42H2O (▼)] and [Ca0.43MnO2.27·0.31H2O (♦)] are from N.B. et al. (6).
