Abstract
HOLLANDITE, cryptomelane, coronadite and α-MnO2 form an isostructural series of the general formula A2-yB8-zX16', A being large ions such as Ba2+, Pb2+ and K+, B small and medium-sized ions such as Mn4+, Fe3+ and Mn2+, and X, in the cases investigated, O2- and OH- ions. The unit cell, which contains one formula unit, is tetragonal or pseudotetragonal, in the latter case monoclinic. Approximate dimensions of the tetragonal unit cell are α = 9·8 A. and c = 2·86 A. When deformed, the short axis will be the b-axis of the monoclinic cell. The deviation of β from 90° is 0·5–1·5°, and the difference α – c is 0·1–0·2 A. The space group of the tetragonal cell is C4h5—I 4/m and the atomic positions are :
Similar content being viewed by others
Article PDF
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
BYSTRÖM, A., BYSTRÖM, A. Crystal Structure of Hollandite. Nature 164, 1128 (1949). https://doi.org/10.1038/1641128a0
Issue Date:
DOI: https://doi.org/10.1038/1641128a0
This article is cited by
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.