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Fig. 12 | Geochemical Transactions

Fig. 12

From: Cryptomelane formation from nanocrystalline vernadite precursor: a high energy X-ray scattering and transmission electron microscopy perspective on reaction mechanisms

Fig. 12

Proposed morphological and structural evolution with time for sample MndBi3_10y. From left to right, structure evolution starts from rumpled nano-sheets of phyllomanganates, proceeds via aggregation and oriented attachment to form laths which then stack along c*, with rotations of ±120° between adjacent laths, to form crystals which contain tectomanganate domains. Assignment of a and b directions was performed according to Atkins and coworkers [60], as such information could not be obtained in the present study

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