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.
Water-corrected drop solution enthalpies versus molar surface area. Surface enthalpy of the hydrous surface is 0.77 ± 0.10 J/m2 for cryptomelane (A), 0.69 ± 0.13 J/m2 for sodium birnessite (B), 0.55 ± 0.11 J/m2 for potassium birnessite (C), and 0.41 ± 0.11 J/m2 for calcium birnessite (D).
