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Science 2 February 1979:
Vol. 203. no. 4379, pp. 456 - 458
DOI: 10.1126/science.203.4379.456
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Articles

Manganese Oxide Tunnel Structures and Their Intergrowths

SHIRLEY TURNER 1 and PETER R. BUSECK 2

1 Department of Geology, Arizona State University, Tempe 85281
2 Departments of Geology and Chemistry, Arizona State University

Natural hollandite and romanechite are widespread barium-containing manganese minerals. High-resolution transmission electron microscopy indicates that intergrowths of the two minerals occur in a coherent manner on the unit-cell level with no apparent ordering of the hollandite and romanechite. Other structures have been imaged that are based on the hollandite and romanechite structures. Electron microscopy holds a key to unraveling the myriad structural complexities of the manganese oxides.

Submitted on August 2, 1978
Revised on October 2, 1978


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