Incommensurate structural and magnetic modulations in potassium-rich cryptomelane, K${}_x$Mn${}_8$O${}_{16}$ ($x\approx 1.45$)

Liam A. V. Nagle-Cocco, Joshua D. Bocarsly, Krishnakanth Sada +9

Cryptomelane is a hollandite-like material consisting of K${}^{+}$ cations in an $\alpha$-MnO${}_2$ tunnel-like crystallographic motif. Cryptomelane with stoichiometry K${}_x$Mn${}_8$O${}_{16}$ ($x…